An Etymological Dictionary of Astronomy and Astrophysics

1a) A single human being, as distinguished from a group (Dictionary.com).

1b) A distinct, indivisible entity; a single thing, being, instance, or item
(Dictionary.com).

1c) Logic: An → object or element taken as the → subject of the → predicates of → first-order logic.

2. Of, pertaining to, or characteristic of a particular person or thing. → individual constant, → individual variable.

Etymology (EN): M.E., from M.L. individualis, from L. individuus “indivisible,” from → in- “not, opposite of” + dividuus “divisible,” from dividere, → divide.

Etymology (PE): Takâl, from tak, → single, + suffix -âl, → -al; takâli with adj. suffix -i.