From Hindupedia, the Hindu Encyclopedia
By M. A. Alwar
Sometimes transliterated as: Unavimsa, UnaviMZa, UUnavimsha
Ūnaviṃśa means one less than 20, that is number 19.
Ūnaviṃśa can be used in all the three genders.
Textual ReferenceŪnaviṃśa has been referred in the jyotistattvam as:
“The divisions of a day are eleven, nineteen and so on”.
- Shabdakalpadrumah by Raja Radhakantdev, Varadaprasada Vasu, Haricarana Vasu