In order to speak with precision about 3D time + 1D space I’ve had to invent many new terms. I’ve tried to make them parallel to the corresponding 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** and

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**Parallel Glossary for Relativity Physics**The terms below are presented in this format: term in bold, definition, units, etymology, corresponding 3D space + 1D time term, and in some cases a suggested symbol. Other terms in this glossary are in italics. Space (length, distance) is symbolized by *r* and time (duration) is symbolized by *t*. The speed of light in a vacuum is symbolized by *c*. Velocity and speed are symbolized by the letter *v*.

**3D position space (or 3D space)** is a 3D vector space of space position vectors.

**3D time position space (or 3D time) **is a 3D vector space of time position vectors.

**alacrity **(linear) is the nonresistance of a time body (or vehicle) to a change in its state of motion.

**angular celentum** for a point particle is the cross product of the particle’s time vector, **t** (relative to some origin), and its celentum vector, **q** = n**u** (cf. angular momentum).

**body (or space body)** is a collection of points in 3D space that can change space position while the time increases.

**celentum** (ce∙len′∙tum) is the *vass* times the *celerity*. From Latin *cele*(r), swift, + (mome)*ntum*. Units of s kg^{–1} m^{–1}. Symbolized by * q* =

*n*(cf. momentum)

**u****celerity** (ce∙ler′∙i∙ty) is the ratio of the *distimement* of a motion to the distance of the same motion. It is a vector with temporal direction and magnitude (which is a *pace*). From Latin *celeritas*, swiftness. Symbol **u**. Mean celerity is Δ**t**/Δ*r*. Instantaneous celerity is d**t**/d*r*. (cf. velocity)

**center of vass** is the mean point in 3D time of the time particles of a time body (or vehicle), weighted by their vasses.

**distance** is that which is measured by a ruler, or by the difference between two positions on an odologe. Units of length in metres, etc. Symbol *r*.

**distimement** (dis∙time′∙ment) is a vector from an initial point to a final point in 3D time. From *dis + time + ment*. Symbol **t**. (cf. displacement)

**duration** is that which is measured by a stopwatch, or by the difference between two positions on a clock. Units of time in seconds, hours, etc. Symbol *t*.

**effort** is a constant *surge*, *Γ*, that moves a time body (or vehicle) the *distimement* *t*: *V = Γt*. (cf. work)

**eventicle **(point vass) is (1) an idealized entity with time position and vass only, or (2) a very small time body. (cf. particle)

**exertion** is the space rate of making effort: *V*/*s* = *Γu* (cf. power)

**Galilei (or Galilean) time-space** is a context in which the measurement of space is the same for all observers (i.e., absolute space), whereas the measurement of time is relative to the motion of each observer. The Galilean time-space transformation is: *t´* = *t – ur*, and for all other coordinates the primed and unprimed values are equal.

**Lorentz time-space** is the relativistic 1D space + 3D time. It includes a factor, *γ*, along with the modal pace, *ç*: *r′* = *γ* (*r* – *t*/*u*) and *t′* = *γ* (*t* – *rç²*/*u*), with *γ* = (1 – *ç*²/*u²*)^{–1/2}. This applies only if |*u*| > *ç*. The superluminal case is: *t′* = *γ* (*t – ur*) and *r′* = *γ* (*r* – *ut*/*ç*²) with *γ* = (1 – *u²*/*ç*²)^{–1/2}, which applies only if |*u*| < *ç*.

**matter** in 3+1 dimensions is a substance that has mass and occupies space. **matter** in 1+3 dimensions is a substance that has vass and occupies time.

**modal pace** is the pace of the mode of observation. It is independent of any observed motion. It serves as a general conversion between time and space. Paces greater than the modal pace are *submodal* (cf. subluminal). Paces less than the modal pace are *supermodal* (cf. superluminal). Symbolized by *ç* (c-cedilla).

**odologe** (o′∙do∙loje) is a means to measure distance indefinitely, such as a measuring wheel. From Greek *odo*(*s*), way/path + (*horo*)*loge*, clock. A reading on an odologe is **the space length**. (cf. a clock)

**pace** is the ratio of the duration of motion to the distance of the same motion. It is a scalar quantity with magnitude but no direction. The magnitude of a *celerity* is a *pace*. A racing term. Units of s/m, min/km, etc. Mean pace is Δ*t*/Δ*r*. Instantaneous pace is d*t*/d*r*. (cf. speed)

**pace of light** is the pace of light in a vacuum, which equals 3.335641 ns/m. Symbolized by *ç* (c-cedilla).

**plime** is a particular portion of 3D time, whether of definite or indefinite extent. From pl(ace) + (t)ime. (cf. place).

**position (or space position)** is a point in a 3D Euclidean space of distances. Represented by a position vector, **r**.

**prestination **(pres∙ti∙na′∙tion) is the rate of change of *celerity* with respect to the magnitude of displacement. Negative prestination is *deprestination*. Verb is *prestinate*. From Italian, *presto*, quickly. Units of s/m². Symbolized by **b** (cf. acceleration)

**rotational alacrity (moment of alacrity)** is the second moment of vass with respect to time from an axis, *t*: *J* = ∫ *t*^{2} d*n* (cf. moment of inertia)

**space length (or 1D space)** is what is measured by a reference odometer. (cf. time)

**strophence **is the rate of change of angular *celentum* of a time body (or vehicle), *σ = *I*β*. From Greek *strophe*, turn + (e)*nce.* (cf. torque)

**surge** is the space rate of change of *celentum*. Units of s kg^{-1 }m^{-2}. Symbol **Γ** = *n b*. (cf. force)

**synmacronize** means to calibrate measuring rods for 3D time + 1D space. From *syn + macron + ize* (“to occur at the same length”) (cf. synchronize)

**temporal direction** is direction in a time space, an angle measured from a reference ray in 3D time

**tempus** is a location in time, or the set of all points in 3D time whose location is determined by specified conditions. From the Latin word for time.

**time body (or vehicle)** is a collection of related points in 3D time that move together. In some contexts a time body is an event.

**time motion** is a continuous change of the time position of a time body (or vehicle) as its distance increases.

**time position (or time)** is a point in a 3D Euclidean space of durations. Represented by a time vector,** t.**

**time-space** is a four-dimensional continuum with one dimension of distance and three dimensions of time. (cf. frame of reference).

**vass** is the nonresistance of a time body (or vehicle) to a change in its state of motion when a net *surge *is applied; it is the inverse of mass. Units of kg^{-1}. Related to *vast*, as in sparse mass. Symbol ℓ. (cf. mass)