|1.||empowering but not compelling the doing of an act|
|2.||philosophy that may or may not occur|
|3.||insurance denoting a form of reinsurance in which the reinsurer has no obligation to accept a particular risk nor the insurer to reinsure, terms and conditions being negotiated for each reinsurance|
|4.||biology Compare obligate able to exist under more than one set of environmental conditions: a facultative parasite can exist as a parasite or a saprotroph|
|5.||of or relating to a faculty|
facultative fac·ul·ta·tive (fāk'əl-tā'tĭv)
Capable of functioning under varying environmental conditions. Used of certain organisms, such as bacteria that can live with or without oxygen.
Capable of occurring along various pathways or under various conditions.
|facultative (fāk'əl-tā'tĭv) Pronunciation Key
Capable of existing under varying environmental conditions or by assuming various behaviors. Bacteria that are facultative aerobes can live in both aerobic and anaerobic environments. A facultative parasite can live independently of its usual host. Compare obligate.