## space-time

space·-time- a four-dimensional continuum with four coordinates, the three dimensions of space and that of time, in which any event can be locatedalso called space-time continuum
- the physical reality inherent in such a continuum

## space-time

noun

*Physics*

## space-time

(*countable and uncountable*, *plural* spacetimes)

- (uncountable, physics) The four-dimensional continuum of the three spatial dimensions plus time.
- An event is a point in spacetime, specified by the coordinates x,y,z and t.

- (physics) An
*n*-dimensional continuum consisting of dimensions of both space & time. Normally spacetime is considered as having 4 dimensions (*x*,*y*,*z*,*t*), but higher-dimensional spacetimes are often encountered in theoretical physics, e.g. the 5-dimensional spacetime of Kaluza-Klein theory or the 11 dimensions of spacetime in M-theory. - (physics) A specific region of the universe with mathematically different properties than the surrounding spacetime. Synonymous with "metric" within the context of general relativity.
- "a Schwarzschild spacetime," "a Reissner-Nordström spacetime," etc. as opposed to sense (2) describing the universe's spacetime as a whole: "a Minkowski spacetime," "a 5-dimensional spacetime," etc.

(*uncountable*)

- (physics) Alternative form of
*spacetime*.

## space-time - Computer Definition

The following units of measure are used to define digital capacities and speeds. For measurements of a meter, see metric system. See binary values, NIST binary and long scale.
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** 10 to the**
**Bits or Bytes Power of:**
Kilo (K) Thousand 3
Mega (M) Million 6
Giga (G) Billion 9
Tera (T) Trillion 12
**Bytes**
Peta (P) Quadrillion 15
Exa (E) Quintillion 18
Zetta (Z) Sextillion 21
Yotta (Y) Septillion 24
Bronto Octillion 27
Geop Nonillion 30
** Storage Capacity Is Measured in:**
CPU word size bits
Disk/tape/USB drive bytes
Memory (RAM) bytes
Memory chip bits
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**Fractions of a second 10 to the**
**Second Power of:**
Millisecond (ms) Thousandth -3
Microsecond (Âµs) Millionth -6
Nanosecond (ns) Billionth -9
Picosecond (ps) Trillionth -12
Femtosecond (fs) Quadrillionth -15
Attosecond (as) Quintillionth -18
Zeptosecond (zs) Sextillionth -21
Yoctosecond (ys) Septillionth -24
**Transmit/Transfer Speed Measured in:**
Parallel bus/channel bytes/sec
Parallel disk drive bytes/sec
Serial bus/channel bits/sec
Serial disk drive bits/sec
Network & communications bits/sec
Disk access time ms
Memory access time ns
Machine cycle Âµs, ns
Instruction execution Âµs, ns
Transistor switching ns, ps, fs
** CPU Speed - Clock Cycles Per Second**
See Hertz.
kilohertz (kHz) thousand
megahertz (MHz) million
gigahertz (GHz) billion
terahertz (THz) trillion