obsolescent

1. Being in the process of passing out of use or usefulness; becoming obsolete.
2. Biology Gradually disappearing; imperfectly or only slightly developed. Used of an organ or other part of an animal or plant.

Origin:

Origin: Latin obsolēscēns, obsolēscent-

Origin: , present participle of obsolēscere, to fall into disuse

Origin: : ob-, away; see ob-

Origin: + solēre, to be accustomed to

Related Forms:

• obˌso·lesˈcence noun

• obˌso·lesˈcent·ly adverb