> as lemmas
back-swimmer
back-swimmer n.
Brit. 
/ˈbakˌswɪmə/
, /ˈbakˌswɪmə/U.S. /ˈbækˌswɪmər/
one that swims on his or her back; the hemipterous insect Notonecta which swims on the surface of pools./ˈbækˌswɪmər/ΘΚΠ
the world > animals > by locomotion > [noun] > that swims > on the back
back-swimmer1862
the world > animals > invertebrates > phylum Arthropoda > class Insecta > subclass Pterygota > [noun] > division Exopterygota or Hemimetabola > order Hemiptera > suborder Heteroptera > family Notonectidae > member of
Notonecta1658
boatfly1681
water boatman1815
boatman1841
back-swimmer1862
notonectid1908
1862 Athenæum No. 1830. 660 The backswimmer..has..the faculty of entangling air in the hairs of its body.
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as lemmas