Definition of "proteinaceous"

By enabling delivery fo active components beneath the skin, the sting and venom opened a bonanza of opportunities for the evolution of highly specific and active components, particularly proteinaceous materials.

2016, Justin O. Schmidt, The Sting of the Wild, Johns Hopkins University Press, page 16

A few types of molecules get sensed by receptors on the tongue. Protons coming off of acids ping receptors for "sour." Sugars get received as "sweet." Bitter, salty, and the proteinaceous flavor umami all set off their own neural cascades.

2018 May 16, Adam Rogers, “The Fundamental Nihilism of Yanny vs. Laurel”, in Wired