semidiaphanous en · ADJ
Etymology
From semi- + diaphanous.
Meanings
-
(not-comparable) Half or imperfectly transparent; translucent.
The Spar is ſemidiaphanous, white with a Caſt of red, and made up of Plates wedged in with each other in various Poſitions.
1729, J[ohn] Woodward, “Classis V. Corpora Coralloidea, & hisce affinia.”, in An Attempt towards a Natural History of the Fossils of England; […], tome I, London: […] F[rancis] Fayram, […]; J[ohn] Senex, […]; and J. Osborn and T[homas] Longman, […], →OCLC, part I (Of the Fossils that are Real and Natural: […]), page 144: