Discal scutellar bristles see dorsoscutellar bristles

discal seta (ARTHRO: Insecta) Large seta on the dorsal surface of the operculum.

discal vein (ARTHRO: Insecta) In Lepidoptera, a crossvein closing the discal or median cell of the wing.

disciform a. [L. discus, circular plate; forma, shape] Having the shape of a plate or disc; discoid.

discinid n. [L. discus, circular plate] (BRACHIO:Inarticulata) A planktonic bivalve larva with round valves, and five pairs of major setae, the fourth of which is larger than the others.

discleritous a. [L. dis, twice; Gr. skleros, hard] (ARTHRO) Pertaining to tergites and sternites being distinct and separate. see synscleritous.

discocellular vein (ARTHRO: Insecta) The discal vein.

discoctasters n.pl. [Gr. diskos, circular plate; okto, eight; aster, star] (PORIF) Spicules containing 8 rays terminating in disks; discooctasters.

discodactylous a. [Gr. diskos, circular plate; daktylos, finger] Having a sucker at the end of a digit.

discohexaster n. [Gr. diskos, circular plate; hex, six; aster, star] (PORIF) A spicule with 6 rays meeting at right angles and terminating in discs; the individual rays may be branched.

discoid a. [Gr. diskos, circular plate; eidos, form] 1. Flat and circular; disc-like; disciform; discous. 2. (MOLL) Certain univalve shells with whorls coiled in one plane.

discoidal a. [Gr. diskos, circular plate: eidos, form] 1. Approaching a disc in form. 2. (MOLL: Gastropoda) Convolute or involute and more or less flattend, as the spire of a shell.

discoidal area 1. The middle area of an organ. 2. (ARTHRO: In-secta) The middle of a wing; discoidal field.

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