| cilia | <cell biology> Microtubular, hairlike structures that some single-celled organisms use for locomotion through liquids. They also cover the cells of certain tissues, such as the epithelium lining the lungs, and help those cells sweep away fluids or particles. Cilia are smaller than flagella. (09 Oct 1997) |
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| ciliary | 1. Relating to any cilia or hairlike processes, specifically, the eyelashes. 2. Relating to certain of the structures of the eyeball. Origin: Mod. L. Ciliaris, relating to or resembling an eyelid, or eyelash, fr. L. Cilium, eyelid (05 Mar 2000) |
| ciliary arteries | Arteries supplying the iris, conjunctiva, choroid, and ciliary body. The anterior ciliary arteries originate in the ophthalmic and lacrimal arteries and supply the iris and conjunctiva; the short posterior ciliary arteries originate in the ophthalmic artery and supply the choroid; the long posterior ciliary arteries originate in the ophthalmic artery and supply the iris and ciliary process. (12 Dec 1998) |
| ciliary blepharitis | Inflammation of the margins of the eyelids. Synonym: ciliary blepharitis, marginal blepharitis. Meibomian blepharitis, inflammation of the eyelid margin and the meibomian glands. (05 Mar 2000) |
| ciliary body | <anatomy> Tissue that includes the group of muscles that act on the eye lens to produce accommodation and the arterial circle of the iris. The inner ciliary epithelium is continuous with the pigmented retinal epithelium, the outer ciliary epithelium secretes the aqueous humour. (18 Nov 1997) |
| ciliary border of iris | The peripheral border of the iris attached to the ciliary body. Synonym: margo ciliaris iridis, ciliary margin of iris. (05 Mar 2000) |
| ciliary canals | Irregularly shaped endothelium-lined spaces within the trabecular reticulum, through which the aqueous filters to reach the sinus venosus sclerae. Synonym: spatia anguli iridocornealis, ciliary canals, Fontana's spaces. (05 Mar 2000) |
| ciliary cartilage | Incorrect term sometimes applied to the inferior tarsus and superior tarsus. See: tarsus. (05 Mar 2000) |
| ciliary crown | The circular figure on the inner surface of the ciliary body, formed by the processes and folds (plicae) taken together. Synonym: ciliary crown, ciliary wreath. (05 Mar 2000) |
| ciliary disk | The darkly pigmented posterior zone of the ciliary body continuous with the retina at the ora serrata. Synonym: ciliary disk, ciliary ring, pars plana. Origin: Mod. L. (05 Mar 2000) |
| ciliary folds | A number of low ridges in the furrows between the ciliary processes; together with the processes they constitute the corona ciliaris. Synonym: plicae ciliares. (05 Mar 2000) |
| ciliary ganglion | <anatomy, neurology> Neural crest derived ganglion acting as relay between parasympathetic neurons of the oculomotor nucleus in the midbrain and the muscles regulating the diameter of the pupil of the eye. (18 Nov 1997) |
| ciliary ganglionic plexus | An autonomic plexus lying on the ciliary muscle, derived from the oculomotor, trigeminal, and sympathetic. Synonym: plexus gangliosus ciliaris. (05 Mar 2000) |
| ciliary glands | A number of modified apocrine sudoriferous glands in the eyelids, with ducts that usually open into the follicles of the eyelashes. Synonym: glandulae ciliares, Moll's glands. (05 Mar 2000) |
| ciliary ligament | <anatomy> The smooth muscle of the ciliary body; it consists of circular fibres (Muller's muscle) and radiating fibres (meridional fibres, or Brucke's muscle); action, in contracting, its diameter is reduced (like a sphincter), reducing tensile (stretching) forces on lens, allowing it to thicken for near vision (accommodation). Synonym: musculus ciliaris, Bowman's muscle, ciliary ligament. (05 Mar 2000) |
| immotile cilia syndrome | <syndrome> Congenital defect in dynein (either absent or inactive) that leads to male sterility and poor bronchial function. Interestingly, nonciliated cells show altered locomotion and 50% of patients have Kartagener's syndrome. (18 Nov 1997) |
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