The Collaborative International Dictionary
Pectoriloquial
Pectoriloquial \Pec`to*ri*lo"qui*al\, a. [Cf. F. pectoriloque.] Pertaining to, or of the nature of, pectoriloquy.
Wiktionary
pectoriloquial
a. (context rare English) Pertaining to, or of the nature of, pectoriloquy.