(physics) The study of classical relativistic equations of motion for actions involving extended nucleons interacting with massive, neutral scalar and vector meson fields.

Synonym of Old Armenian

The written Chinese language used from the Zhou Dynasty (1045 B.C.E.) (especially the Spring and Autumn Period), through to the end of the Han Dynasty (220 C.E.). In Chinese, 古文 (“Ancient Writing”) or, formally, 古典漢語 (“Classical Chinese”). The language of many classics of Chinese literature.

Thermodynamics that studies a thermodynamic system as an undivided whole, described by macrostate variables such as volume, pressure and temperature, instead of considering the thermodynamic system as an ensemble of moving molecules.

The form of the Arabic language used in literary texts in 7th to 9th centuries. It is based on the Medieval dialects of Arab tribes, and is the language of the Qur'an.

Misspelling of classical antiquity.

(music) the musical period of time following the Baroque period and preceding the Romantic period, spanning c.1750-c.1820.

(logic) A kind of logic based on the principles that each proposition has a truth value of either "true" or "false", but not both, and that if a proposition were to be both true and false or neither true nor false then a result would be that all propositions would be both true and false.

An extinct language of the Northwest branch of the Semitic language family.

A radio programming format that includes hard rock music from the mid-1960s through 1980 or later.