sternothyroid
noun
ster·no·thy·roid
| \ ˌstər-nō-ˈthī-ˌrȯid
\
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Medical Definition of sternothyroid
: an infrahyoid muscle on each side of the body below the sternohyoid that arises from the sternum and from the cartilage of the first and sometimes of the second ribs, inserts into the thyroid cartilage, and acts to draw the larynx downward by depressing the thyroid cartilage