| 单词 | visceral cleft |
| 释义 | > as lemmasvisceral cleft b. visceral arch, one of a set of parallel ridges in the region of the mouth in the embryonic skull. visceral cleft, one of the intervals between the visceral arches. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > embryo or fetus > embryo parts > [noun] > skull or brain visceral cleft1870 metencephalon1871 chondrocranium1875 protocerebrum1885 protencephalon1887 parachordal1892 tritencephalon1910 parencephalon1911 1870 G. Rolleston Forms Animal Life Introd. p. xlvii The malleus of Mammalia..being developed out of the proximal elements of the first visceral arch. 1872 St. G. Mivart Lessons Elem. Anat. (1873) i. 5 These arches are separated by temporary apertures termed ‘visceral clefts’. 1875 Sir W. Turner in Encycl. Brit. I. 831/1 Immediately below each maxillary lobe four arches, called branchial or visceral, arise in the ventral aspect of the head. < as lemmas |
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