rectus

n., pl., -ti (-tī').
Any of various straight muscles, as of the abdomen, eye, neck, and thigh.

[New Latin (mūsculus) rēctus, from Latin, straight (muscle). See rectum.]

[L.] straight.

• r. abdominis muscle
• ocular r. muscle
• r. sheath — the sleeve of fascia which surrounds the rectus abdominis muscle and which is derived from the aponeurotic tendons of the other abdominal muscles.

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The noun has one meaning:

Meaning #1: any of various straight muscles

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