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subtranslucent
subtranslucent adj. 
/ˌsʌbtranzˈl(j)uːs(ə)nt/, /ˌsʌbtrɑːnsˈl(j)uːs(ə)nt/, /ˌsʌbtransˈl(j)uːs(ə)nt/,
Brit. /ˌsʌbtrɑːnzˈl(j)uːs(ə)nt/
, /ˌsʌbtrɑːnzˈl(j)uːs(ə)nt//ˌsʌbtranzˈl(j)uːs(ə)nt//ˌsʌbtrɑːnsˈl(j)uːs(ə)nt//ˌsʌbtransˈl(j)uːs(ə)nt/U.S. /ˌsəbˌtræn(t)ˈspɛrənt/
/ˌsəbˌtræn(t)ˈspɛrənt/ΘΚΠ
the world > matter > light > transparency or translucence > [adjective] > semi-transparent
translucid1640
hornya1656
semi-diaphanous1663
semi-opacous1663
semi-opaque1692
translucent1726
semi-transparent1797
subtranslucent1828
vaporous1863
1828 J. Fleming Hist. Brit. Animals 199 In the variety called silver eel, the belly and sides are silvery and sub-translucent.
1868 J. D. Dana Syst. Mineral. (ed. 5) v. 194 Plasma... Rather bright-green to leek-green, also sometimes nearly emerald-green, and subtranslucent or feebly translucent.
1955 J. C. Brown & A. K. Dey India's Mineral Wealth (ed. 3) 623 The bloodstones are subtranslucent, dark green chalcedony speckled with red; the moss agates..perfectly translucent stones.
2002 Copeia No. 3. 789/1 Dorsal, anal, pectoral, and pelvic fins pale to subtranslucent.
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