- any of several muscles in the front part of the thigh constituting part of the quadriceps muscle, the action of which assists in extending the leg.
Origin of vastus
< Latin: vast
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for vastus
In the dog and the cat the vastus externus is the most voluminous of the three portions which constitute the triceps muscle.
It covers the rectus and vastus externus portions of the triceps cruris; it is also in relation with the gluteal muscles.
The two fasciculi then pass towards the knee, being in relation with the rectus and the vastus internus of the triceps.
We also partly see there, in these animals, the vastus internus and the rectus of the triceps (see Fig. 87).
Vastus animus immoderata, incredibilia, nimis alta semper cupiebat.De Bello Catilinario et Jugurthino
Caius Sallustii Crispi (Sallustius)