An Etymological Dictionary of Astronomy and Astrophysics
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An international high-precision time standard based on the Greenwich Mean Time and adjusted to compensate for divergence from atomic time. It is based on the non-uniform rotation of the Earth (UT1) and the perfectly uniform international atomic time (TAI). UTC differs from TAI by the total number of → leap seconds, so that UT1-UTC stays smaller than 0.9 sec in absolute value.

→ coordinate; → universal; → time.

1a) Of, pertaining to, or characteristic of all or the whole; relating to, affecting, or including everyone in a group or situation.
1b) Of or pertaining to the → Universe, all nature, or all existing things.
2) A trait, characteristic, or property, as distinguished from a particular individual or event, that can be possessed in common, as the care of a mother for her young (Dictionary.com).
See also: → Coordinated Universal Time, → universal astrolabe, → universal gas constant, → universal IMF, → universal quantifier, → Universal Time.
Related concepts: → all, → general, → omni-, → public, → total.

→ universe; → -al.

An → astrolabe which could be used at any → latitude.

→ universal; → astrolabe.

Same as → gas constant.

→ universal; → gas; → constant.

Same as → canonical IMF.

→ universal; → initial mass function.

A symbol of → predicate logic which expresses that the statements within its scope are → true for everything, or every instance of a specific thing. The symbol ∀ "for all" is used as the universal quantifier. Universal quantifiers are normally used in logic in conjunction with predicate symbols, which say something about a variable or constant, in this case the variable being quantified.

→ universal; → quantifier.

A measure of time that conforms, within a close approximation, to the mean diurnal motion of the Sun and serves as the basis off all civil timekeeping. The local civil time for a position on the Greenwich meridian.

→ universal; → time.

Sale as → Coordinated Universal Time (UTC).

→ Coordinated Universal Time (UTC).

The character or state of being universal.

→ universal; → -ity.

Same as → weak equivalence principle.

→ universality; → free; → fall.

The hypothesis whereby there exists a universal parent → distribution function which describes the stellar → initial mass function in individual star forming events. A consensus appears to have emerged in the community that the stellar IMF is largely invariant for star formation conditions as are found throughout the Local Group of galaxies at the present time. For details and discussion see Pavel Kroupa (2012), Recent advances on IMF research, arXiv.org/abs/astro-ph/1210.1211, and references therein.

→ universality; → initial mass function.