(comparative more obsoletely, superlative most obsoletely)
- (biology) Imperfectly or indistinctly developed.
obsolete + -ly
Variant of obsolete
- no longer in use or practice; discarded
- no longer in fashion; out-of-date; passé
- Biol. rudimentary or poorly developed as compared with its counterpart in other individuals of a related species, the opposite sex, etc.; vestigial: said of an organ, etc.
Origin of obsoleteClassical Latin obsoletus, past participle of obsolescere, to go out of use ; from ob- (see ob-) + an unverified form -solescere (; from exolescere, to grow out of use ; from ex-, ex- + uncertain or unknown; perhaps alescere, to increase: see adolescent)