Par″a‐blast (?), n. [Cf. Gr. � to grow beside. See Para-, and -blast.] (Biol.) 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.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.