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cilium
cil·i·um C0356100 (sĭl′ē-əm)n. pl. cil·i·a (-ē-ə) 1. A microscopic hairlike process extending from the surface of a cell or unicellular organism. Capable of rhythmical motion, it acts in unison with other such structures to bring about the movement of the cell or of the surrounding medium.2. An eyelash.3. Botany One of the hairs along the margin or edge of a structure, such as a leaf, usually forming a fringe.
[Latin, eyelid; see kel- in Indo-European roots.]cilium (ˈsɪlɪəm) n, pl cilia (ˈsɪlɪə) 1. (Zoology) any of the short thread-like projections on the surface of a cell, organism, etc, whose rhythmic beating causes movement of the organism or of the surrounding fluid2. (Anatomy) the technical name for eyelash[C18: New Latin, from Latin: (lower) eyelid, eyelash]cil•i•a (ˈsɪl i ə)
n.pl., sing. cil•i•um (ˈsɪl i əm) 1. short, hairlike, rhythmically beating organelles on the surface of certain cells that provide mobility, as in protozoans, or move fluids and particles along ducts in multicellular forms. 2. the eyelashes. [1705–15; New Latin, pl. of cilium eyelash, perhaps from Latin supercilium eyebrow; see superciliary] cil·i·um (sĭl′ē-əm) Plural cilia A hair-like projection capable of a whipping motion and found in certain vertebrate cells and microscopic organisms, especially protozoans. Some microorganisms, such as paramecia, use cilia for movement. Cilia lining the human respiratory tract act to remove foreign matter from air before it reaches the lungs.cilium(pl. cilia) A microscopic, hairlike projection from some cells.Thesaurus| Noun | 1. | cilium - a hairlike projection from the surface of a cell; provides locomotion in free-swimming unicellular organismscell organ, cell organelle, organelle - a specialized part of a cell; analogous to an organ; "the first organelle to be identified was the nucleus" | | 2. |  cilium - any of the short curved hairs that grow from the edges of the eyelidseyelash, lashhair - a covering for the body (or parts of it) consisting of a dense growth of threadlike structures (as on the human head); helps to prevent heat loss; "he combed his hair"; "each hair consists of layers of dead keratinized cells"eyelid, lid, palpebra - either of two folds of skin that can be moved to cover or open the eye; "his lids would stay open no longer" |
Translationscilium
cilium1. any of the short thread-like projections on the surface of a cell, organism, etc., whose rhythmic beating causes movement of the organism or of the surrounding fluid 2. the technical name for eyelashCilium a slender filamentous or setaceous process found on cells that is capable of rhythmic movements. Among Protozoa, cilia are characteristic of infusorians. In some lower multicellular animals, such as turbellarians, cilia are found on all external covering elements (integumentary epithelium). The larvae of most coelenterates and sponges have a ciliated covering. In vertebrates, including humans, only a few specialized cells have cilia. For example, in man cilia cover the epithelium of the respiratory tract, the eustachian tubes, the vasa deferentia, the oviducts, and the uterus. Locomotor activity of the cilia ensures movement of the cell in a fluid medium; a ciliated cell that is fixed to a substrate produces currents of fluid in the surrounding medium. The average cilium has a length of 5–15 microns and a diameter of 0.1–0.6 microns. The number of cilia on one cell ranges from ten to 22 in man to 2,500–15,000 in infusorians. The ultra-structures of cilia and flagella are identical. Externally cilia are covered with a three-layered membrane that becomes the surface membrane of the cell. In the center are two central tubular fibrils, which extend the length of the cilia, and nine peripheral fibrils, each of which is double. In the superficial layers of the cell cytoplasm, each cilium originates from the basal body, which has a structure similar to that of the cilium but lacks the central fibrils. The peripheral fibrils cause movement of the cilium, and the central ones apparently play a supportive role and possibly serve to conduct excitation. IU. I. POLIANSKII cilium
cilium [sil´e-um] (L.) singular of cilia.cil·i·um, pl. cil·i·a (sil'ē-ŭm, -ă), Do not confuse this word with psyllium.1. Synonym(s): eyelash2. A motile extension of a cell surface, for example, of certain epithelial cells, containing nine longitudinal double microtubules arranged in a peripheral ring, together with a central pair. [L. an eyelid] cilium (sĭl′ē-əm)n. pl. cil·ia (-ē-ə) 1. A microscopic hairlike process extending from the surface of a cell or unicellular organism. Capable of rhythmical motion, it acts in unison with other such structures to bring about the movement of the cell or of the surrounding medium.2. An eyelash.3. Botany One of the hairs along the margin or edge of a structure, such as a leaf, usually forming a fringe.cil·i·um, pl. cilia (sil'ē-ŭm, -ă) 1. Synonym(s): eyelash. 2. A motile extension of a cell surface, e.g., of certain epithelial cells, containing nine longitudinal double microtubules arranged in a peripheral ring, together with a central pair. [L. an eyelid] Fig. 103 Cilium . (a) Vertical section. (b) Transverse section. cilium (pl. cilia) a fine cytoplasmic structure in the form of a thread which projects from the surface of cells. Each cell may bear numerous cilia which beat constantly in one direction, either moving liquid over the surface of the cells concerned or moving the cell(s) in relation to the liquid, for example, locomotion in PROTOZOANS. They are also present in all Metazoa except the ARTHROPODS and NEMATODES, but in only a few plants, for example, cycads. The cilium has a similar structure to the FLAGELLUM, consisting of an outer membrane surrounding a matrix containing two central MICROTUBULES around which is a ring of nine more microtubules (a ‘9 + 2’ structure). At the base of the cilium is a basal body concerned with ATP production.cilium An eyelash (plural: cilia).cilium
Related to cilium: selenium, psyllium huskSynonyms for ciliumnoun a hairlike projection from the surface of a cellRelated Words- cell organ
- cell organelle
- organelle
noun any of the short curved hairs that grow from the edges of the eyelidsSynonymsRelated Words |