| 单词 | contractile vacuole |
| 释义 | > as lemmascontractile vacuole 1. Having the property of contracting or drawing together; capable of contracting. Esp. contractile vacuole, a vacuole in some Protozoa which expels a solution of waste matter on contraction. ΘΚΠ the world > space > extension in space > reduction in size or extent > [adjective] > relating to contraction > having property of contracting contractible1651 contractile1706 the world > animals > invertebrates > protozoa > [noun] > member of > parts of > vacuole which expels waste contractile vacuole1877 1706 Phillips's New World of Words (new ed.) Contractile, a Term made use of by some Physicians, to express such Muscles, and other Parts of the Body as are contracted. 1793 T. Beddoes Observ. Nature & Cure Calculus 171 The irritable or contractile, improperly called the muscular fibre. 1844 W. B. Carpenter Animal Physiol. i. 19 The contractile tissues, by which the movements of plants are produced. 1872 T. H. Huxley Lessons Elem. Physiol. (ed. 6) ii. 40 The substance of the heart is contractile. 1877 T. H. Huxley Man. Anat. Invertebrated Animals ii. 76 The name of contractile vacuoles is given to spaces in the protoplasm [of Protozoa], which slowly become filled with a clear watery fluid, and, when they have attained a certain size, are suddenly obliterated by the coming together, on all sides, of the protoplasm in which they lie. 1902 Encycl. Brit. XXV. 266/1 In the protoplasm contractile vacuoles similar to those of lower animals have been occasionally detected. 1959 J. Clegg Freshwater Life Brit. Isles (ed. 2) ii. 29 Simple single-celled creatures, such as Amoeba and Paramecium, usually have large expandable bubbles or spaces in the midst of the protoplasm called contractile vacuoles, in which excess water collects and whence it is then conducted out of the creature. < as lemmas |
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