deltoid
- n a large triangular muscle covering the shoulder joint and serving to abduct and flex and extend and rotate the arm
- s triangular or suggesting a capital delta, with a point at the apex
- So Arnold snuck through the left-right paradigm with the dexterity of a well-honed deltoid flex.
- Ladies would prod his dorsal, deltoid and pectoral development with carefully gloved fingers and ask if he were real.
- Like many a conductor before him (Leopold Stokowski, Willem Mengelberg, Richard Strauss), he has a sub-deltoid bursitis or "glass arm," an affliction which orchestra leaders .