The Collaborative International Dictionary
Unigeniture
Unigeniture \U`ni*gen"i*ture\, n. [L. unigenitus only-begotten;
unus one + gignere, genitum, to beget.]
The state of being the only begotten. [R.]
--Bp. Pearson.
Wiktionary
unigeniture
n. (cx theology English) The state of being the only begotten.