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Pepsinogen :: Pepsinogen (n.) The antecedent of the ferment pepsin. A substance contained in the form of granules in the peptic cells of the gastric glands. It is readily convertible into pepsin. Also called propepsin.

Gastroepiploic :: Gastroepiploic (a.) Of or pertaining to the stomach and omentum.

Proboscidifera :: Proboscidifera (n. pl.) An extensive division of pectinibranchiate gastropods, including those that have a long retractile proboscis, with the mouth at the end, as the cones, whelks, tritons, and cowries. See Illust. of Gastropoda, and of Winkle..

Turritella :: Turritella (n.) Any spiral marine gastropod belonging to Turritella and allied genera. These mollusks have an elongated, turreted shell, composed of many whorls. They have a rounded aperture, and a horny multispiral operculum..

Metagastric :: Metagastric (a.) Of or pertaining to the two posterior gastric lobes of the carapace of crabs.

Archaeostomatous :: Archaeostomatous (a.) Applied to a gastrula when the blastopore does not entirely close up.

Ptenoglossa :: Ptenoglossa (n. pl.) A division of gastropod mollusks having the teeth of the radula arranged in long transverse rows, somewhat like the barbs of a feather..

Gastroelytrotomy :: Gastroelytrotomy (n.) The operation of cutting into the upper part of the vagina, through the abdomen (without opening the peritoneum), for the purpose of removing a fetus. It is a substitute for the Caesarean operation, and less dangerous..

Oliva :: Oliva (n.) A genus of polished marine gastropod shells, chiefly tropical, and often beautifully colored..

Pubic :: Pubic (a.) Of or pertaining to the pubes; in the region of the pubes; as, the pubic bone; the pubic region, or the lower part of the hypogastric region. See Pubes..

Operculum :: Operculum (n.) The lid closing the aperture of various species of shells, as the common whelk. See Illust. of Gastropoda..

Pepsin :: Pepsin (n.) An unorganized proteolytic ferment or enzyme contained in the secretory glands of the stomach. In the gastric juice it is united with dilute hydrochloric acid (0.2 per cent, approximately) and the two together constitute the active portion of the digestive fluid. It is the active agent in the gastric juice of all animals..

Rhipidoglossa :: Rhipidoglossa (n. pl.) A division of gastropod mollusks having a large number of long, divergent, hooklike, lingual teeth in each transverse row. It includes the scutibranchs. See Illustration in Appendix..

Action :: Action (n.) Any one of the active processes going on in an organism; the performance of a function; as, the action of the heart, the muscles, or the gastric juice..

Mesogastrium :: Mesogastrium (n.) The umbilical region.

Polygastric :: Polygastric (n.) One of the Polygastrica.

Snout :: Snout (n.) The anterior prolongation of the head of a gastropod; -- called also rostrum.

Placophora :: Placophora (n. pl.) A division of gastropod Mollusca, including the chitons. The back is covered by eight shelly plates. Called also Polyplacophora. See Illust. under Chiton, and Isopleura..

Pectinibranchiata :: Pectinibranchiata (n. pl.) A division of Gastropoda, including those that have a comblike gill upon the neck..

Gastrolith :: Gastrolith (n.) See Crab's eyes, under Crab..

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