rectus

Etymology
Borrowed from,.

Noun

 * 1)  Any of several straight muscles in various parts of the body, as of the abdomen, thigh, eye etc.
 * 2)  Any of a number of muscles controlling the movement of the eyeball.
 * 1)  Any of a number of muscles controlling the movement of the eyeball.
 * 1)  Any of a number of muscles controlling the movement of the eyeball.

Etymology
Perfect passive participle of. Corresponds to, from.

Participle

 * 1) led straight along, drawn in a straight line, straight, upright.
 * 2)  right, correct, proper, appropriate, befitting.
 * 3)  morally right, correct, lawful, just, virtuous, noble, good, proper, honest.
 * 1)  right, correct, proper, appropriate, befitting.
 * 2)  morally right, correct, lawful, just, virtuous, noble, good, proper, honest.