FACULTATIVE


Meaning of FACULTATIVE in English

adj.1 Law enabling an act to take place.

2 that may occur.

3 Biol. not restricted to a particular function, mode of life, etc.

4 of a faculty.

Derivatives:

facultatively adv.

Etymology: F facultatif -ive (as FACULTY)

Oxford English vocab.      Оксфордский английский словарь.