lattissimus dorsi

lattissimus dorsi

[lə′tis·ə·məs ′dȯr·sē]
(anatomy)
The widest muscle of the back; a broad, flat muscle of the lower back that adducts and extends the humerus, is used to pull the body upward in climbing, and is an accessory muscle of respiration.
References in periodicals archive ?
There was very little activity on the back extensors , lattissimus dorsi or the obliques.
Photo: In the heart-wrap procedure performed at Allegheny General Hospital, the left lattissimus dorsi was isolated with its nerve-vessel bundle intact, brought through the ribs and wrapped around the heart.