quadriceps

quad·ri·ceps   (kwŏd'rĭ-sěps')    n.  The large four-part extensor muscle at the front of the thigh. [quadri- + (bi)ceps.] quad'ri·cip'i·tal (-sĭp'ĭ-tl) adj.

Main Entry: quad·ri·ceps
Pronunciation: 'kwäd-r&-"seps
Function: noun
: a large extensor muscle of the front of the thigh dividedabove into four parts which include the rectus femoris, vastus lateralis, vastus intermedius, and vastus medialis, and which unite in a single tendon to enclose the patella as a sesamoid bone at theknee and insert as the patellar ligament into the tuberosity of the tibia called also quadriceps femoris, quadriceps muscle

quadriceps quad·ri·ceps (kwŏd'rĭ-sěps')
n.
The large four-part extensor muscle at the front of the thigh. adj.
Having four heads, said of certain muscles.