Obsolescent

ob-so-les′ent, adj. going out of use.— n. Obsolesc′ence .— adj. Ob′solete , gone out of use: antiquated: ( zool. ) obscure: not clearly marked or developed: rudimental.— adv. Ob′soletely .— ns. Ob′soletene ; Obsolē′tion ( rare ); Ob′soletism . [L. obsolescens , -ent is , pr.p. of obsolescĕre , obsoletum — ob , before, solēre , to be wont.]