noun, plural bur·sae [bur-see] /ˈbɜr si/, bur·sas.
- Anatomy, Zoology. a pouch, sac, or vesicle, especially a sac containing synovia, to facilitate motion, as between a tendon and a bone.
noun plural -sae (-siː) or -sas
- a small fluid-filled sac that reduces friction between movable parts of the body, esp at joints
- zoology any saclike cavity or structure
- a city in NW Turkey: founded in the 2nd century bc; seat of Bithynian kings. Pop: 1 413 000 (2005 est)Former name: Brusa
by 1788 as an English word in physiology, shortened from medieval Latin bursa mucosa “mucus pouch,” from Medieval Latin bursa “bag, purse,” from Late Latin bursa, variant of byrsa “hide,” from Greek byrsa “hide, skin, wineskin, drum,” of unknown origin; cf. (n.).
n. pl. bur•sas
- A sac or saclike bodily cavity, especially one containing a viscous lubricating fluid and located between a tendon and a bone or at points of friction between moving structures.
Plural bursae (bûr′sē) bursas
- A flattened sac containing a lubricating fluid that reduces friction between two moving structures in the body, as a tendon and a bone.
A fluid-filled sac or cavity that reduces friction between the bones,, and in the body’s joints.