butyraceous
/ˌbʌtɪˈreɪʃəs, ˌbjuːtɪ-/Definitions
1. adjective
Producing or resembling butyric acid; having a foul or unpleasant smell
“The butyraceous odor of the rotten food filled the entire kitchen.”
2. adjective
Relating to or yielding butyric acid
“The butyraceous fermentation process produces a strong-smelling liquid.”