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单词 fulcral
释义

fulcraladj.

Brit. /ˈfʊlkrəl/, /ˈfʌlkrəl/, U.S. /ˈfʊlkrəl/, /ˈfəlkrəl/
Origin: Formed within English, by derivation. Etymons: fulcrum n., -al suffix1.
Etymology: < fulcrum n. + -al suffix1.
Relating to or involving a fulcrum or fulcra (in various senses).
ΘΚΠ
the world > animals > fish > parts of fish > [adjective] > having scales > of scales of specific type
fulcral1809
placoid1842
cycloid1847
ctenoid1872
cycloidal1872
1809 W. Martin Outl. Attempt Knowl. Extraneous Fossils 116 Fulcral..belonging to a fulcre.
1835 Sat. Mag. 24 Oct. 156/1 To break a piece five inches square, and seven feet long, between the fulcral points, demanded a force of four tons, three quarters, and seventeen pounds.
1872 H. A. Nicholson Man. Palæontol. xxix. 323 Fin borders generally with fulcral scales.
1927 U.S. Patent 1,631,104 1/1 The present invention overcomes this difficulty by providing a variable fulcral point for support of the gripping lever.
1979 N.Z. Jrnl. Zool. 6 271/1 Pelvic fins with a short fulcral spine, and connected ventrally by a membrane.
2008 R. Raffan Turning Wood (ed. 3) 110/2 If you use the lower half of the edge (to the right of the fulcral line), the downward force of the wood against the edge is easily controlled.
This entry has been updated (OED Third Edition, December 2016; most recently modified version published online March 2022).
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adj.1809
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