BLASTEMA

(Lat.), n.n. Bla?st(bla%st)-e(a)’ma’. Gen., blastem’- atos (-lis). Gr., BAéornua (=BAdom). Fr., blastéme. Ger., Blastem, Keimstoff, Bildungsfli iykeit. It.,Sp.,blastema. 1. Of Richard, the embryo Boren (blast us) of a plant, apart from the cotyledons, [B, 123.) 2. Of Wallroth, the thallus of a lichen, [B, 123. 3. Of Hayne, a young shoot, a turio. [B, 198.] 4. Und if fer ent i ate embryonic ti ue; the material out of which à part is to be formed; the homogeneous semi-fluid substance, formed by the solution or fusion of embryonic cells, in which the anatomical elements are developed; according to Robin, the substance resulting from the elaboration of nutritive material furnished to the anatomical elements by the blood. [H; J, 27, 33.] 5. We is man’s term for a thin nucleated layer of protoplasm covering the whole yolk in the eggs of some insects and spiders, not divided into distinct cells. [‘* Quart. Jour. of Micr. Sci.,” 1884 (J).] 6. A free or parenchymatous plastic exudate. (L, 41.] Cf. CYrOBLASTEMA.—B. pHi. A hair papilla. J.]-O ifie b., O ifying b., Sub periosteal b. Külliker’s ‘or what is now commonly designated the osteogenetic layer of the periosteum or the sub periosteal ti ue. [J, 24, 30, 32.]