| 单词 | tetrad-deme |
| 释义 | > as lemmastetrad-deme tetrad-deme n. Biology an aggregation of tetrads: see 2b (b) and deme n.2 2. ΘΚΠ the world > life > biology > substance > cell > [noun] > mass or group of polyblast1873 tetrad1876 triad1876 tetrad-deme1883 stem-line1892 paraganglion1907 polyclone1975 1883 P. Geddes in Encycl. Brit. XVI. 843/2 Starting from the unit of the first order, the plastid or monad, and terming any undifferentiated aggregate a deme, we have a monad-deme integrating into a secondary unit or dyad, this rising through dyad-demes into a triad, this forming triad-demes, and these when differentiated becoming tetrads, the Botryllus-colony with which the evolution of compound individuality terminates being a tetrad-deme. < as lemmas |
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