Dictionary Definition :
Definition[1]
:
groan : (nt.) nitthunana. (m.) aṭṭassara. (v.i.) nitthunāti; anutthunāti.
Source
:
A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]