saw n. [A.S. sagu, saw] (ARTHRO: Insecta) a. In Symphyta, transverse ridges provided on the fused 2nd valvulae. b. In Diptera, the anterior serrated plate of the spiracular apparatus of Mansoniini larvae.
saw bristles (ARTHRO: Crustacea) A heavy row of setae between the molar and incisor process on the gnathal lobe of the mandible.
saxicavous a. [L. saxum, rock; cavus, hollow] Said of rock-boring mollusks.
saxicolous a. [L. saxum, rock; colere, to inhabit] Living among rocky or stony areas.
scabellum n. [L. scabellum, footstool] (ARTHRO: Insecta) In Diptera, the distal basal portion of the halteres.
scabrous a. [L. scaber, rough] Rough; rugged; with little rigid points or minute irregularities.
scalariform, scalaroid a. [L. scalaris, ladder; forma, shape] Ladder-like; having transverse bars and spaces like a ladder.
scales n.pl. [OF. escale, husk] 1. A small, more or less flattened, plate-like exterior covering. 2. (ARTHRO) a. In Cheli-cerata, flattened, modified setae of Arachnida. b. In Crustacea, small calcareous plate on the peduncle of lepadomorph barnacles. see scaphocerite. c. In Insecta, flat unicellular outgrowths of the body-wall; highly modified clothing hairs of all Lepidoptera, many Collembola, in some Thysanura, Coleoptera, Diptera and Hymenoptera. 3. (MOLL) a. In Bivalvia, localized projections of the outer shell; usually on a rib. b. In Polyplacophora, small calcareous bodies decorating the dorsal side of the girdle, sometimes closely set, overlapping and of various shapes, being smooth or with minute striations. 4. (NEMATA: Sacernentea) Thickened, retrorse modifications of the body annuli.
scalids n.pl. [Gr. skalidon, hoe] 1. (KINOR) Circlets and longitudinal rows of spines on the protrusible cone-shaped head and neck. 2. (LORI) In Nanaloricus mysticus, many recurved spines on the cone-shaped anterior end (introvert) on its lateral surface. 3. (PRIAP) Longitudinal riblike, conical projections arranged in circles and longitudinal rows on the barrel-shaped anterior proboscis region (introvert).
scalloped a. [OF. escalope, shell] Indented, cut at the edges into rounded hollows or segments of circles; crenate.
scalp n. [Dan. skalp, shell] (moll) A bed of shellfish, especially of mussels or oysters.
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