collarette

collarette
1. The sinuous, scalloped line in the iris that divides the central pupillary zone from the peripheral ciliary zone and marks the embryonic site of the atrophied minor vascular circle of the iris. 2. Brittle scales encircling eyelashes in staphylococcal blepharitis. SYN: iris frill.

* * *

col·lar·ette (kol″ər-etґ) 1. a narrow rim of loosened keratin overhanging the periphery of a circumscribed skin lesion, attached to the normal surrounding skin, such as in candidiasis or pityriasis rosea. 2. an irregular jagged line dividing the anterior surface of the iris into two regions, the ciliary zone and the pupillary zone. Called also angular line. 3. in mycology, a ring around the apex of a phialide resulting from rupture during release of the first phialospore.

Collarette separating the ciliary and pupillary zones.


Medical dictionary. 2011.

Look at other dictionaries:

  • Collarette — Collaret Col lar*et , ||Collarette Col la*rette , n. [F. collerette, dim. of collier. See {Collar}.] A small collar; specif., a woman s collar of lace, fur, or other fancy material. [Webster 1913 Suppl.] …   The Collaborative International Dictionary of English

  • collarette — n. [L. dim. collare, band for the neck] 1. (CHAETOGNATHA) Thickened distended cells in the neck region that in some species extend posteriorly along the trunk for some distance; in one instance as far as the lateral fins. 2. (NEMATA) Either… …   Dictionary of invertebrate zoology

  • collarette — noun /kɒləˈɹɛt/ a) A small collar, especially as a kind of necklace of lace, fur etc. for women. b) A type of dahlia having a small collar of short inner petals …   Wiktionary

  • collarette — n. small collar of lace or fur that women wear (also collaret) …   English contemporary dictionary

  • collarette — col·lar·ette …   English syllables

  • collarette — noun see collaret …   Useful english dictionary

  • collarette dahlia — noun : any of various dahlias having flower heads with one row of true ray florets and with shorter rays forming a collarlike fringe around the disk …   Useful english dictionary

  • Biett collarette — (byet) [Laurent Thйodore Biett, French dermatologist, 1781–1840] see under collarette …   Medical dictionary

  • Biett collarette — a papular syphilid in which the central papule is surrounded by a ring of scales …   Medical dictionary

  • angular line — collarette …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”