单词 | water measurer |
释义 | water measurern. Any of various predatory heteropteran bugs of the family Hydrometridae, esp. the genus Hydrometra, having a long narrow body with fragile legs and living on the surface film of water; also (North American) called marsh treader. Also (U.S.): a pond skater (family Gerridae). ΘΚΠ the world > animals > invertebrates > phylum Arthropoda > class Insecta > subclass Pterygota > [noun] > division Exopterygota or Hemimetabola > order Hemiptera > suborder Heteroptera > family Hydrometridae > member of water measurer1830 marsh treader1895 1830 J. Rennie Insect Transformations xv. 357 We have just witnessed a similar process in a water measurer.., which we had put into a glass containing water. 1854 A. Adams et al. Man. Nat. Hist. 243 Water-measurers (Hydrometridæ). Head generally as broad as thorax, [etc.]. 1890 Hardwicke's Sci.-gossip 26 28/2 Great ‘water-measurers’ (Gerris lacustris) were running about in a jerky manner, on the surface of the water. a1933 J. A. Thomson Biol. for Everyman (1934) I. xiii. 245 Some insects never leave the water at all, such as the well-known water-measurer (Hydrometra) that runs about on the surface-film. 1953 H. Mellanby Animal Life in Fresh Water (ed. 5) viii. 147 The Watermeasurer or Water-gnat..is a very attenuated pond skater. 2006 M. Golley Compl. Garden Wildlife Bk. 37 The Water Measurer is common and widespread in this country. This entry has been updated (OED Third Edition, September 2015; most recently modified version published online June 2022). < |
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