Meaning

noun a fact about some part (as opposed to general)

noun a small part that can be considered separately from the whole

noun (logic) a proposition that asserts something about some (but not all) members of a class

originFrom Middle English particuler, from Anglo-Norman particuler, Middle French particuler, particulier, from Late Latin particularis (“partial; separate, individual”), from Latin particula (“(small) part”). Equivalent to particle + -ar. Compare particle.

Etymology from Wiktionary, CC BY-SA 3.0