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semi-ovoidal
semi-ovoidal adj. 
/ˌsɛmiˌoʊˈvɔɪd(ə)l/
Brit. /ˌsɛmɪəʊˈvɔɪdl/
, /ˌsɛmɪəʊˈvɔɪdl/U.S. /ˌsɛˌmaɪˌoʊˈvɔɪd(ə)l/
, /ˌsɛˌmaɪˌoʊˈvɔɪd(ə)l//ˌsɛmiˌoʊˈvɔɪd(ə)l/ΚΠ
1851 R. R. Madden Shrines & Sepulchres I. 229 The interior assumes a semi-ovoidal shape, or that of which the section will be a parabola.
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