lucency (n.)youdaoicibaDictYouDict
1650s, from lucent + -cy. Lucence is from late 15c.
lucent (adj.)youdaoicibaDictYouDict
mid-15c., "shining, bright, luminous," from Latin lucentem (nominative lucens), present participle of lucere "to shine" (see light (n.)). Meaning "lucid, clear" is from 1820. Related: Lucently.
translucence (n.)youdaoicibaDictYouDict
early 15c., from Medieval Latin translucentia, from Latin translucentem (see translucenct). Related: Translucency.
translucent (adj.)youdaoicibaDictYouDict
1590s, from Latin translucentem (nominative translucens), present participle of translucere "to shine through," from trans- "through" (see trans-) + lucere "to shine" (see light (n.)). Related: Translucently.
noctilucent cloudyoudaoicibaDictYouDict
"A luminous cloud of a kind occasionally seen at night in summer in high latitudes, at the altitude of the mesopause", Late 19th century: from Latin nox, noct- 'night' + lucere 'to shine' + -ent.