deltoid adjective & noun. ['dɛltɔɪd] M18.
[French deltoïde or mod. Latin deltoides from Greek deltoeidēs, from DELTA: see -OID.]
A. adjective.
1. Like the Greek letter delta (Δ) in shape; triangular. M18.
b. Anatomy. Designating or pertaining to the large muscle of triangular shape covering the shoulder joint. M18.

2. Of the nature of a (river) delta. M19.
b. noun.
1. The deltoid muscle. M18.

2. A deltoid moth. M19.

■ deltoidal adjective M19.

[TahlilGaran] English Dictionary ▲