Dictionary Definition :
Definition[1]
:
勢速 'Rapidity', 'instantaneousness.'
Definition[2]
:
rapidity : (nt.) sīghatta; turitatta. (m.) vega.
Source
:
A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]