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单词
keel
释义
keel
Encyclopedia
理学
鸟纲(化石)
释
keel
龙骨
地质学特别是古生物学领域,是古代脊椎动物的骨骼和牙齿化石的统称,特别是第三纪后期和第四纪的哺乳类(如象、犀牛、马、鹿、骆驼、羚羊等)的骨骼和牙齿化石。
Biology
keel
龙骨瓣;龙骨突
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bisecant
bisect
bisectability
bisected chords
bisected-perimeter point
bisecting
bisecting conformation
bisecting line
bisecting plane
bisecting point
bisection
bisectional curvature
bisection error
bisection method
bisection procedure
bisection technique
bisection width
bisector
bisector of a dihedral angle
bisector of an angle
bisector of an exterior angle of triangle
bisector of an interior angle of triangle
bisector plane
bisectrix
bisectrix of an angle
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