| ̷ ̷ ̷ ̷ˌ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ noun
Etymology: methylol + urea
: either of two compounds formed as the first stage in making urea-formaldehyde resins:
a. : a crystalline compound H 2 NCONHCH 2 OH obtainable from one mole each of urea and formaldehyde and used especially for impregnating wood with which it forms hard resins — called also monomethylolurea
b. : dimethylolurea