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1. a delicate fiber or thread.
2. in an x-ray tube, the wire (cathode) that makes electrons available for interaction with the anode when it is heated to incandescence to form an electron cloud.
actin filament one of the thin contractile filaments in a myofibril, composed mainly of actin; each actin filament is surrounded by three myosin filaments.
myosin filament one of the thick contractile filaments in a myofibril, composed mainly of myosin; each myosin filament is surrounded by six actin filaments.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
one of the contractile elements in skeletal, cardiac, and smooth muscle fibers; in skeletal muscle, the filament is about 15 nm thick and 1.5 mcm long.
Synonym(s): thick filament
Farlex Partner Medical Dictionary © Farlex 2012
my·o·sin fil·a·ment(mī'ō-sin fil'ă-mĕnt)
One of the contractile elements in skeletal, cardiac, and smooth muscle fibers; in skeletal muscle, the filament is about 10 nm thick and1.5 mcm long.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012