actin

[ak-tuhn]

ac·tin

[ak-tuhn]
noun Biochemistry.
a globulin that is present in muscle plasma and that in connection with myosin plays an important role in muscle contraction.

Origin:
1940–45; perhaps act + -in2

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Actin is always a great word to know.
So is astatine. Does it mean:
Symbol: At; atomic weight: 210; atomic number: 85
Symbol: Os; atomic weight: 190.2; atomic number: 76
Dictionary.com Unabridged

actin-

variant of actino- before a vowel: actinism.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Collins
World English Dictionary
actin (ˈæktɪn)
 
n
a protein that participates in many kinds of cell movement, including muscle contraction, during which it interacts with filaments of a second protein, myosin
 
[C20: from act + -in]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

actin ac·tin (āk'tĭn)
n.
One of the protein components found in muscle, existing as F-actin or G-actin, into which actomyosin can be split and which acts with myosin in muscle contraction.

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
actin   (āk'tĭn)  Pronunciation Key 
A protein found in all eukaryotic cells, forming filaments that make up a main component of the cell's supporting matrix or cytoskeleton. Actin and the protein myosin together make up the contractile units (called sarcomeres) of skeletal muscle fibers.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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