facultative (adj)

of or relating to the mental faculties

facultative (adj)

able to exist under more than one set of conditions

"a facultative parasite can exist as a parasite or a saprophyte"

facultative (adj)

granting a privilege or permission or power to do or not do something

"a facultative enactment"

facultative (adj)

not compulsory

"facultative courses in the sciences"

facultative (Adjective)

Of or relating to faculty, especially to mental faculty

facultative (Adjective)

Not obligate; optional, discretionary or elective

facultative (Adjective)

That grants permission or power to do something

facultative (Adjective)

Able to grow in or outside of a host or host cell