In order to speak with precision about time-space (1D space + 3D time) I’ve had to invent many new terms. I’ve tried to make them parallel to the corresponding space-time (3D space + 1 D time) terms and to follow scientific practice of using Greek and Latin roots. These new time-space terms are placed parallel to their corresponding space-time terms in two pdf’s, ** Parallel Glossary for Classical Physics & Transportation** and

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**Parallel Glossary for Relativity Physics**Note that the term *time* has multiple meanings: duration, distime, distimement, 3D time, scalar time. These correspond to the meanings of *space*: length, distance, displacement, 3D space.

The terms below are presented in this format: term in bold, definition, units, etymology, and in some cases a suggested symbol. Other terms in this glossary are in italics.

**acceleration** is the change in the *displacement* per unit of the magnitude of its *distimement*. Verb is *accelerate* with negative *decelerate*. Faster is in the direction of motion. Units of m/s². Symbol **a**.

**angular fulmentum** for a transicle is the cross product of the particle’s time position vector, **w** (relative to an origin), and its *fulmentum* vector, **q** = n**u**.

**angular momentum** for a point particle is the cross product of the particle’s position vector, **r** (relative to an origin), and its momentum vector, **p** = m**v**.* *

**center of mass** is the mean point in space of the particles of an object, weighted by their masses.

**center of vass** is the mean instant in time of the *transicles* of a subject, weighted by their vasses.

**chronological** is in order by distime from a reference point.

**clock** shows the present instant in the local timeline.

**d****iachronic **events are sequential in time, i.e., occur with increasing distime.

**diamacronic** events are sequential in space, i.e., occur with increasing distance.

**displacement** is the vector of the distance and direction between two points.

**distance** is the metric of space, the shortest (geodesic) length between two points.

**distime** is the metric of time, the shortest (geodesic) duration between two instants.

**distimement** is the vector of the distime and direction between two instants in time. From *dis+time+ment*.

**duration** (or time interval) is the extent of motion as measured by a stopwatch or clock. Units of s.

**effort** (1/work) is a *rush* **Γ** applied over a *distimement* **w**: *V* = **Γ**·**w**. Const. *rush*: *V = Γ* Δ*t* = *Q* Δ*s*. Units O·s.

**elaphra** is the *rush* exerted on a subject by *levity*.

**energy** is the capacity for doing work. Units, J = N·m = W·s. Symbol *E*.** **

**event** is an occurrence associated with a point (of space) and an instant (of time); or a set of points and instants.

**eventline** is a linear ordering of events.

**exertion** is the space (length) rate of effort: *Q* = d*V*/d*s* = **Γ**·**u**. Units: 1/J·m = O·s/m.

**expedience **is the change in the *distimement* per unit of the magnitude of its *displacement*. Verb is *expedite* with negative *de-expedite*. Faster is in the opposite direction of motion. Units of s/m². Symbol **b**.

**extragy** is the capacity for effort. Units, 1/J = O·s. Symbol *Y*.

**f****acilia** (linear**) **is the nonresistance of a subject to a change in its state of movement. Latin for *easy*.

**figure **is a substance with *vass* that occupies a period.

**force** is the time (duration) rate of change of *momentum***.** Units in newtons, N = kg m s^{‑2}. Symbol **F** = *m***a** = Δ**p**/Δ*t*.

**fulment** is the product of a physical quantity such as *rush* times its distime from an instant or line in time

**fulmentum** (ful∙men′∙tum) is the *legerity* weighted by (times) the *vass*. Latin, prop, support. Units of kg^{‑1} s m^{‑1}. Symbol * q* =

*n*.

**u****gravitation** is the mutual force that all bodies have, which is directed toward the body with greater mass.

**impetus** is a *rush* **Γ** applied over a length Δ*s*, or change in *fulmentum*. Units O·m. Symbol **K = Γ**·Δ*s* = Δ**q**.

**impulse** is a force **F** applied over a duration Δ*t*, or the change in momentum. Units N·s. Symbol **J** = **F**·Δ*t* = Δ**p**.

**inertia** (linear) is the resistance of an object to any change in its state of motion.

**instant** is the smallest period.

**instantaneous** events occur in an instant of time.

**legerity** (le·jer′·i·ty) is the *distimement* of motion per unit of the magnitude of its *displacement*. Symbol **u**. Mean legerity is Δ**w**/Δ*s*. *Punctaneous* *legerity* is d**w**/d*s* = d**w**/|d**r**|. From Middle French *legereté*, quickness or lightness in movement.

**length** (or length interval) is the extent of motion as measured by a ruler or odometer. Units of m, km.

**levitation** is the mutual *rush* that all bodies have, which is directed toward the body with greater *vass*.

**macronological** is in order by distance from a reference point.

**mass** is the resistance of an object to a change in its condition of motion when a net force is applied. Units of kg. Symbol *m*.

**matter** is a substance with mass that occupies a place.

**moment** is the product of a physical quantity such as force times its distance from a point or line in space.

**momentum** (linear) is the *velocity* weighted by (times) the *mass*. Latin. Units in kg m s^{‑1}. Symbol **p** = *m***v**.

**motion** is physical change.

**motion** of an object is a continuous change of its position in space and in a timeline.

**m****ovement** of a subject is a continuous change of its position in time and in a route line.

**object** is a body with an origin (starting point) of motion.

**odologe** (o′∙do∙loje) shows the present point in the current route line.

**pace** is the duration of motion per time interval. Symbol *u*. From racing. Units of s/m, min/km, etc. *Punctaneous* pace is d*t*/d*s*, which equals the magnitude of *punctaneous* *legerity*.

**particle** (point mass) is (1) a very small object with motion and mass; (2) an idealized point object with space position and mass.

**period **is a part of time for events to occur.

**place** is a part of space for events to occur.

**point** is the smallest place.

**power** is the time (duration) rate of doing work: *P* = d*W*/d*t* = **F** · **v**. Units: Watt, W = J/s = N·m/s.

**pseudo-duration** is measured by length and expressed as time, as with multiplying length by the free-flow pace.

**pseudo-length** is measured by time and expressed as length, as with multiplying time by the free-flow speed.

**punctaneous** events occur in a point of space.

**reference frame** is a space-time coordinate system and set of reference points in space-time.** **

**reference timeframe** is a time-space coordinate system and set of reference points in time-space.

**rotational facilia **(fulment of facilia) is the second *fulment* of *vass* with respect to distimement **w** from an axis: J = ∫ **w**^{2} d*n*.

**rotational inertia **(moment of inertia) is the second moment of mass with respect to displacement **r** from an axis: I = ∫ **r**^{2} d*m*.** **

**route line** is an eventline in *macronological* order.

**rush** **is the **space (length)** rate of change of fulmentum. **Units in

*oldtons*, O = kg

^{-1 }s m

^{-2}. Symbol

**Γ**=

*n*= Δ

**b****q**/Δ

*s*.

**simuloculous **events occur at the same distance from a reference instant.

**simultaneous** events occur at the same distime from a reference point.

**space angle** or direction is the proportion of a circle between two intersecting rays in space.

**space body** (object) is composed of points.

**space** is a 3D differential geometry with extent measured by length.

**space p****osition** (or location) of a point is the *displacement* vector to it from a reference point.

**space-time** is space with a timeline, i.e., space parameterized by distime.

**speed** is the length of motion per time interval. Symbol *v*. Units of m/s, km/hr, etc. Instantaneous speed is d*s*/d*t*, which equals the magnitude of instantaneous velocity.

**strophence **is the rate of change of angular *fulmentum* of a subject, *σ = *I*β*. From Greek *strophe*, turn + (e)*nce.*

**subject** is a body with a destination (ending point) of movement.

**symmacronous** motions are parallel in space, e.g., have the same orbit. Greek *macron,* long.

**synchronous** motions are parallel in time, as in having the same period. Greek *chron,* time.

**time angle** or direction is the proportion of a revolution between two intersecting rays in time.

**time body** (subject) is composed of instants.

**time** is a 3D differential geometry with extent measured by duration.

**time line **is an eventline in chronological order.

**time p****osition** (or *chronation*) of an instant is the *distimement* vector to it from a reference instant.

**time-space** is time with a route line, i.e., time parameterized by distance.

**torque** is the rate of change of angular momentum of an object, *τ = *I*α*. Units: N·m.** **

**transicle** (point vass) is (1) a very small subject with movement and vass; (2) an idealized point subject with time position and *vass*. From *transi*(t) + (parti)*cle*.

**traversal length **(arc length) is the length along a path of motion; or the integral of space positions.

**traversal time** (arc time**) **is the duration along a path of motion; or the integral of time positions.

**vass** is the nonresistance of a subject to a change in its condition of movement when a net *rush *is applied. Inverse of mass. From vast. Units of kg^{-1}. Symbol *n*.

**velocity** (vel∙o′∙ci∙ty) is the *displacement* of motion per unit of the magnitude of its *distimement*. Symbol **v**. Mean velocity is Δ**r**/Δ*t*. Instantaneous velocity is d**r**/d*t* = d**r**/|d**w**|. From Latin *velocitas*, swiftness, rapidity.

**weight** is the force exerted on an object by gravity.

**work** is a force **F** applied over a displacement **r**: *W* = **F**· **r**. For a constant force: *W = F* Δ*s* = *P* Δ*t*. Units: J = N·m.

**worldline** is an eventline in spacetime.