单词 | membranelle |
释义 | membranellen. Biology. In some ciliates and rotifers: a flattened triangular or fan-shaped organ formed from two or three short rows of cilia which behave as though fused together, used for locomotion or feeding. Usually in plural. ΚΠ 1910 G. N. Calkins Protozoöl. (U.K. ed.) i. 50 Rows of small membranes, called membranelles, are found in three of the four orders of ciliata. 1935 Science 19 July 69/2 The metachronal wave covers seven membranelles, five of which are in effective stroke, two in recovery. 1975 Genetics 81 631 Instead of the usual three membranelles some cells have a greater number, most frequently 4 or 5, but occasionally up to 7. 1991 R. S. K. Barnes & K. H. Mann Fund. Aquatic Ecol. (ed. 2) x. 193/1 In Cyclidum, a water current is driven by a group of membranelles (cilia placed so closely that they move together as if joined) towards a row of cilia about 0.25 mm apart. This is a new entry (OED Third Edition, June 2001; most recently modified version published online March 2022). < |
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