tetragonus

tet·ra·go·nus

(tet'ră-gō'nŭs),
Obsolete term for platysma (muscle).
References in periodicals archive ?
tetragonus 1978, Loza-Cornejo & Terrazas, 2003; Mauseth & Plemons- Rodiriguez, 1997, 1998 Acharagma aguirreana Eggli, 1984 Ariocarpus fissuratus, A.