platysma

Borrowed from New Latin platysma, from Ancient Greek πλᾰ́τῠσμᾰ (plátusma, “flat object”), from πλᾰτῠ́νω (platúnō, “widen”) +‎ -μᾰ (-ma, “nominal suffix”).

• IPA^(key): /pləˈtɪz.mə/

platysma (plural platysmas or platysmata)

1. (anatomy) A broad sheet of muscle that is situated on each side of the neck immediately under the superficial fascia belonging to the group of facial muscles, extends from the collar bone to the angle of the jaw and overlaps the sternocleidomastoid; it is innervated by the facial nerve, draws the lower lip and the corner of the mouth to the side and down, and when moved forcefully expands the neck and draws its skin upward.

• platysmal

• “platysma”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “platysma”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.

• playmats

Borrowed from Ancient Greek πλᾰ́τῠσμᾰ (plátusma, “flat object”), from πλᾰτῠ́νω (platúnō, “widen”) +‎ -μᾰ (-ma, “nominal suffix”).

• (Classical) IPA^(key): /plaˈtys.ma/, [pɫ̪äˈt̪ʏs̠mä]
• (modern Italianate Ecclesiastical) IPA^(key): /plaˈtis.ma/, [pläˈt̪izmä]

platysma n (genitive platysmatis); third declension (New Latin)

1. (anatomy) platysma muscle

Third-declension noun (neuter, imparisyllabic non-i-stem).

• → English: platysma