obsolete

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obsolete

Biology (of parts, organs, etc.) vestigial; rudimentary

obsolete

[‚äb·sə′lēt]
(biology)
A part of an organism that is imperfect or indistinct, compared with a corresponding part of similar organisms.
(engineering)
No longer satisfactory for the purpose for which obtained, due to improvements or revised requirements.
References in periodicals archive ?
Legs: Cylindrical, unarmed, with or without hispid tubercles; metacoxae widely separated, space between them about one-half the distance of coxae; coxae placed near lateral margin of pleurae; tibiae obsoletely sulcate; tarsi with basal segment subequal to second and third segments taken together.
There is something uniquely dugri, something shockingly honest, something uniquely, resolutely, perhaps obsoletely Israeli about the performance.
puniceus, Mannerheim wrote: "elongatus, depressus, laete sanguineus, antennis nigrofuscis, pectore abdomineque rufoferrugineis, thorax subrotundato, lateribus leviter denticulato, supra obsolete bisulcato" (Elongate, depressed, rich red, antennae nigro-fuscus, abdomen rufo-ferrugineous; thorax rounded, laterally weakly denticulate, above obsoletely bisulcate).