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Blastoidea :: Blastoidea (n. pl.) One of the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so named on account of their budlike form.

Ectoderm :: Ectoderm (n.) The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of Blastoderm..

Mesoplast :: Mesoplast (n.) The nucleus of a cell; mesoblast.

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..

Blasted :: Blasted (a.) Confounded; accursed; detestable.

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.

Windlass :: Windlass (n.) An apparatus resembling a winch or windlass, for bending the bow of an arblast, or crossbow..

Morula :: Morula (n.) The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See Segmentation..

Aiguille :: Aiguille (n.) An instrument for boring holes, used in blasting..

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

Blastosphere :: Blastosphere (n.) The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

Osteoplast :: Osteoplast (n.) An osteoblast.

Blasty :: Blasty (a.) Causing blast or injury.

Bioplast :: Bioplast (n.) A tiny mass of bioplasm, in itself a living unit and having formative power, as a living white blood corpuscle; bioblast..

Smite :: Smite (v. t.) To blast; to destroy the life or vigor of, as by a stroke or by some visitation..

Accrementition :: Accrementition (n.) The process of generation by development of blastema, or fission of cells, in which the new formation is in all respect like the individual from which it proceeds..

Tegmental :: Tegmental (a.) Of or pertaining to a tegument or tegmentum; as, the tegmental layer of the epiblast; the tegmental cells of the taste buds..

Mesoderm :: Mesoderm (n.) The layer of the blastoderm, between the ectoderm and endoderm; mesoblast. See Illust. of Blastoderm and Ectoderm..

Blast :: Blast (v. t.) Hence, to affect with some sudden violence, plague, calamity, or blighting influence, which destroys or causes to fail; to visit with a curse; to curse; to ruin; as, to blast pride, hopes, or character..

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