butyro-
(ˈbjuːtɪrəʊ)
comb. form of L. butyrum, used in technical, chiefly chemical words, as butyro-acetic, combining butyric and acetic. Cf. butyr-.
| c 1865 Circ. Sc. I. 336/2 The chemist calls these butyric, butyro-acetic, and formic acids. |
butyro-
(ˈbjuːtɪrəʊ)
comb. form of L. butyrum, used in technical, chiefly chemical words, as butyro-acetic, combining butyric and acetic. Cf. butyr-.
| c 1865 Circ. Sc. I. 336/2 The chemist calls these butyric, butyro-acetic, and formic acids. |
Oxford English Dictionary