cil·i·a

[sil-ee-uh]
plural noun, singular cil·i·um [sil-ee-uhm] .
1.
Biology. minute hairlike organelles, identical in structure to flagella, that line the surfaces of certain cells and beat in rhythmic waves, providing locomotion to ciliate protozoans and moving liquids along internal epithelial tissue in animals. See diag. under paramecium.
2.
Anatomy. the eyelashes.

Origin:
1705–15; Neo-Latin, plural of cilium eyelash, Latin: upper eyelid, perhaps a back formation from supercilium eyebrow; see supercilium

Dictionary.com Unabridged

cil·i·um

[sil-ee-uhm] .
noun
singular of cilia.

Origin:
< Latin

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
Cite This Source Link To cilia
00:10
Cilia is always a great word to know.
So is transitional cells. Does it mean:
side that is uppermost
cells that cover a surface and flatten out when stretched
Collins
World English Dictionary
cilia (ˈsɪlɪə) [Click for IPA pronunciation guide]
 
n
the plural of cilium

cilium (ˈsɪlɪəm) [Click for IPA pronunciation guide]
 
n , pl cilia
1.  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 eyelash
 
[C18: New Latin, from Latin: (lower) eyelid, eyelash]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

cilia
1715, from L. cilia, pl. of cilium "eyelid, eyelash." It sometimes is pluralized in English, which is an error.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

cilium cil·i·um (sĭl'ē-əm)
n. pl. cil·i·a (-ē-ə)

  1. See eyelash.

  2. A microscopic hairlike process extending from the surface of a cell or unicellular organism, capable of rhythmical motion, and acting with other such structures to cause the movement of the cell or of the surrounding medium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
cilium   (sĭl'ē-əm)  Pronunciation Key 
Plural cilia
A tiny hairlike projection on the surface of some cells and microscopic organisms, especially protozoans. Cilia are capable of whipping motions and are used by some microorganisms, such as paramecia, for movement. Cilia lining the human respiratory tract act to remove foreign matter from air before it reaches the lungs.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Flagella usually occur one per organism whereas cilia are present as many, many per cell.
Instead, it uses beating hairs called cilia to create imperceptible water currents, which bring its prey straight into its mouth.
Activated by heat, the artificial cilia work in groups of four, each group measuring about one millimeter across.
Once it is in the throat, hairlike projections called cilia move it toward the
  gut.
Images for cilia
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