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The Collaborative International Dictionary
Geason

Geason \Gea"son\, a. [OE. gesen, geson, rare, scanty, AS. g?sne barren, wanting. Cf. Geest.] Rare; wonderful. [Obs.]
--Spenser.

Wiktionary
geason

a. (context rare or dialectal English) rare; uncommon; scarce.