teething

Noun, Verb (intransitive)

teeth=ing

WORDNET DICTIONARY

teething(n = noun.process) dentition, odontiasis - the eruption through the gums of baby teeth;

is a kind of development, growing, growth, maturation, ontogenesis, ontogeny

has particulars: precocious dentition

Derived form verb teethe₁

teething, n.

The process of the first growth of teeth, or the phenomena attending their issue through the gums; dentition. [1913 Webster]