The Collaborative International Dictionary
Extancy
Extancy \Ex"tan*cy\, n. [L. extantia, exstantia.]
The state of rising above others; a projection.
--Evelyn.
--Boyle.
Wiktionary
extancy
Etymology 1 n. (context obsolete English) The state of rising above others; a projection. Etymology 2
n. (context obsolete English) The state of being extant; existence.