Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
across
across mike
across-the-board
acrostic
ACRS
acrylamide
acrylate
acrylate resin
acrylic
acrylic acid
acrylic resin
acrylonitrile
ACT
act
act of contrition
act of faith
act of God
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

actin
ac·tin [ áktin ]


noun 
Definition:
 
protein involved in cell movement: a protein present in all cells and in muscle tissue where it plays a role in contraction
[Mid-20th century. < Latin actus (see act)]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft