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Gymnoblastea :: Gymnoblastea (n. pl.) The Athecata; -- so called because the medusoid buds are not inclosed in a capsule.

Entoblast :: Entoblast (n.) The inner germ layer; endoderm. See Nucleolus.

Odontoblast :: Odontoblast (n.) One of the cells which secrete the chitinous teeth of Mollusca.

Blow-out :: Blow-out (n.) The cleaning of the flues of a boiler from scale, etc., by a blast of steam..

-derm :: -derm (n.) A suffix or terminal formative, much used in anatomical terms, and signifying skin, integument, covering; as, blastoderm, ectoderm, etc..

Whirl-blast :: Whirl-blast (n.) A whirling blast or wind.

Gastrula :: Gastrula (n.) An embryonic form having its origin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a more general sense, an ideal stage in embryonic development. See Gastraea..

Blaster :: Blaster (n.) One who, or that which, blasts or destroys..

Cnidoblast :: Cnidoblast (n.) One of the cells which, in the Coelenterata, develop into cnidae..

Siderated :: Siderated (a.) Planet-struck; blasted.

Splanchno-skeleton :: Splanchnopleure (n.) The inner, or visceral, one of the two lamellae into which the vertebrate blastoderm divides on either side of the notochord, and from which the walls of the enteric canal and the umbilical vesicle are developed. See Somatopleure..

Exsufflation :: Exsufflation (n.) A blast from beneath.

Reveille :: Reveille (n.) The beat of drum, or bugle blast, about break of day, to give notice that it is time for the soldiers to rise, and for the sentinels to forbear challenging..

Blight :: Blight (v. t.) To affect with blight; to blast; to prevent the growth and fertility of.

Micromere :: Micromere (n.) One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum..

Crinoidea :: Crinoidea (n. pl.) A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula..

Somatopleure :: Somatopleure (n.) The outer, or parietal, one of the two lamellae into which the vertebrate blastoderm divides on either side of the notochord, and from which the walls of the body and the amnion are developed. See Splanchnopleure..

Ento- :: Ento- () A combining form signifying within; as, entoblast..

Fauld :: Fauld (n.) The arch over the dam of a blast furnace; the tymp arch.

Herakline :: Herakline (n.) A picrate compound, used as an explosive in blasting..

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