Definitions for facultativeˈfæk əlˌteɪ tɪv
Random House Webster's College Dictionary
fac•ul•ta•tiveˈfæk əlˌteɪ tɪv(adj.)
conferring a faculty, privilege, permission, or the power of doing or not doing something:
a facultative enactment.
being left to one's option or choice; optional.
having the capacity to live under more than one specific set of environmental conditions, as a plant that can lead either a parasitic or a nonparasitic life
Ref: (opposed to obligate ).
of or pertaining to the mental faculties.
having the potential of taking place or assuming a specified character.
Origin of facultative:
1810–20; < F
of or relating to the mental faculties
able to exist under more than one set of conditions
"a facultative parasite can exist as a parasite or a saprophyte"
granting a privilege or permission or power to do or not do something
"a facultative enactment"
"facultative courses in the sciences"
Of or relating to faculty, especially to mental faculty
Not obligate; optional, discretionary or elective
That grants permission or power to do something
Able to grow in or outside of a host or host cell