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Relating to the mesoblast; as, the mesoblastic layer.

A spermatocyte or spermoblast.

One of the more or less columnar cells on the outer surface of the pulp of a tooth; an odontoplast. They are supposed to be connected with the formation of dentine.

One of the protoplasmic cells which occur in the osteogenetic layer of the periosteum, and from or around which the matrix of the bone is developed; an osteoplast.

A portion of the mesoblast (of peripheral origin) of the developing embryo, the cells of which are especially concerned in forming the first blood and blood vessels. C. S. Minot.

Of or pertaining to the parablast; as, the parablastic cells.

The protoplasmic matter which surrounds the entoblast, or cell nucleus, and undergoes segmentation. -- Per`i*blas"tic, a.

Any free-swimming gonophore of a hydroid; a hydroid medusa.

A minute yellowish body present in the interior of certain rhizopods.

Same as Spermoblast.

permospore, each of which is destined to become a spermatozoid; a spermatocyte; a spermatoblast.

One of the cells which, in sponges, secrete the spongin, or the material of the horny fibers.

One of a peculiar kind of internal buds, or germs, produced in the interior of certain Bryozoa and sponges, especially in the fresh- water species; -- also called winter buds.

t condition of the ovum in which there are three primary germinal layers, or in which the blastoderm splits into three layers.

A whirling blast or wind. A whirl-blast from behind the hill. Wordsworth.

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.

diaphragm so arranged that its action opens and closes valves, producing synchronous air blasts sufficient to operate a larger diaphragm with greater amplitude of vibration.

A breath or blast of wind.

An instrument for boring holes, used in blasting.

To allay or alleviate; to lighten. [Obs.] That shall alegge this bitter blast. Spenser.