| canities | Graying of hair. See: poliosis. Origin: L., fr. Canus, hoary, gray (05 Mar 2000) |
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| canities circumscripta | An isolated bundle of white eyelash's among normally pigmented eyelash's. Synonym: canities circumscripta, ciliary poliosis, poliosis. (05 Mar 2000) |
| canities poliosis | The condition in which the eyelash's grow from the eyelid at a site other than the lid margin. Synonym: canities poliosis. (05 Mar 2000) |
| canities unguium | The occurrence of white spots or patches under the nails, of unknown cause; the decoloration may be total or in the form of lines (striate or transverse leukonychia) or dots (punctate leukonychia). Synonym: achromia unguium, canities unguium, leukopathia unguis. Origin: Leuko-+ G. Onyx (onych-), nail Apparent leukonychia, pallor of the nail not due to subungual air bubbles. (05 Mar 2000) |
| rapid canities | Whitening of hair overnight or over a few days; in the latter case, may be seen in alopecia areata, when surviving pigmented hairs are preferentially shed from gray hair. (05 Mar 2000) |
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