semi-opaqueadj.
Partly opaque; only partially transparent.
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the world > matter > light > transparency or translucence > [adjective] > semi-transparent
translucid1640
hornya1656
semi-diaphanous1663
semi-opacous1663
semi-opaque1692
translucent1726
semi-transparent1797
subtranslucent1828
vaporous1863
1692 J. Ray Wisdom of God (ed. 2) ii. 198 The Element of Water being semi-opake.
1766 Philos. Trans. 1765 (Royal Soc.) 55 31 (note) It looks like a piece of yellowish glass, semiopaque and brittle.
1834 M. Somerville On Connexion Physical Sci. (1849) xiv. 114 Certain semi-opaque minerals and other substances becoming transparent when plunged in water.
1871 A. B. Garrod Essentials Materia Medica (new ed.) 340 Semi-opaque Socotrine and Barbadoes aloes.
This entry has not yet been fully updated (first published 1911; most recently modified version published online June 2019).
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adj.1692