“sectroid”的英英意思

单词 sectroid
释义 sectroid|ˈsɛktrɔɪd|
[? f. sector + -oid.]
The curved surface of two adjacent groins in a vault.
1860Newlands Carp. & Joiner's Assist. 77 To find the covering of the smaller sectroid BPLOD.1875in Knight Dict. Mech.

 

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