Douglas Harper's Etymology Dictionary
amino-
1887, as an element in compound words involving chemicals, from comb. form of amine. Amino acid is attested from 1898.
Wiktionary
amino-
pre. (context chemistry English) Of amines and of the amino functional group.
Usage examples of "amino-".
All afternoon she worked at matchups while looking through the mineral balances and amino-acid counts.
In fact, this particular linkage—" He traced an amino-acid chain with one finger when they both crowded closer to look.