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Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
n. pl. rec·ti (-tī′)
Any of various straight muscles, as of the abdomen, eye, neck, and thigh.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
rectusAny of several straight muscles, such as the central vertical muscle on either side of the midline of the abdomen (the rectus abdominis), the rectus femoris on the front of the thigh or the four rectus muscles that move the eyeball. From the Latin rectus , straight.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
rectusa straight muscle, such as either of the two muscles that serve, together with the more anterior pair of oblique muscles, to move the eyeball. They are situated behind the eyeball in a posterior position.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005