tyremesis

ty·rem·e·sis

(tī-rem'ĕ-sis),
Vomiting of curdy material by infants.
Synonym(s): tyrosis (1)
[G. tyros, cheese, + emesis, vomiting]

tyremesis

A rarely used term for the vomiting of milk curds by infants, popularly known in American English as “spit-up”.