[ lα:'tɪsɪməs ]
(also ~ dorsi 'dɔ:sʌɪ , -si: )
■ noun ( plural latissimi lα:'tɪsɪmʌɪ , -mi: ) Anatomy either of a pair of large, roughly triangular muscles covering the lower part of the back.
Origin
C17: mod. L., from musculus ~ dorsi , lit. 'broadest muscle of the back'.