An Etymological Dictionary of Astronomy and Astrophysics

Existing as the only one or as the sole example.
Limited to a single outcome or result. → uniqueness theorem.

Etymology (EN): From Fr. unique, from L. unicus “single, sole,” from unus, → one.

Etymology (PE): Yektâ “unique,” from yek, → one,

• tâ “fold, plait, ply; piece, part” (Mid.Pers. tâg “piece, part”).