What does rectus mean?
Rectus is a Latin-derived term used chiefly in anatomy and medicine. As a noun, it denotes one of a number of straight muscles, most often the rectus abdominis, the muscle forming the front of the abdomen and commonly associated with the appearance of a six-pack. As an adjective, rectus means straight or correctly aligned and occurs in names such as rectus femoris, a thigh muscle that extends the leg at the knee. The word comes from Latin rectus, meaning “straight,” “upright,” or “right.” Although rectus may appear to resemble rectum when encountered in medical terminology, the two words refer to different things: a rectus is a muscle, while the rectum is part of the digestive tract. The term is uncommon in general conversation but precise and widely understood in clinical, anatomical, and sports contexts.
Any of several straight muscles, especially either of the paired muscles forming the front of the abdominal wall.
"An injury to the rectus can cause pain along the front of the abdomen."
The unqualified noun form is relatively uncommon; anatomical names such as rectus abdominis and rectus femoris are more frequent.
Straight or correctly aligned, especially of an anatomical muscle or structure.
"The rectus femoris is one of the principal muscles extending the knee."
Chiefly used in anatomical and medical terminology.
The standard plural is the Latinized form recti, pronounced with a long final i; it is used chiefly in anatomical contexts.
"Both recti were visible when the athlete contracted his abdomen."
The word rectus comes from the Latin for “straight,” a fitting name for muscles designed to pull in a direct line.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does rectus come from?
Rectus comes from Latin rectus, meaning “straight,” “upright,” or “right,” a word associated with the Latin verb regere, “to straighten” or “direct.” Latin developed several words from this root, including rectilinear through rectus and the English verb rectify; Medieval Latin correctus also became English correct. In modern English, rectus survives principally in the established names of straight anatomical muscles.
How rectus is actually used
In anatomy, rectus is normally used attributively, as in rectus femoris. The noun form is relatively technical, while the adjective is chiefly found in medical and anatomical contexts.
Easily confused with rectus
Rectus refers to a straight muscle or means straight, whereas the rectum is the final section of the large intestine.