From The Collaborative International Dictionary of English v.0.48 :
Thea \The"a\, prop. n. [NL. See Tea.] (Bot.)
A genus of plants found in China and Japan; the tea plant.
[1913 Webster]
Note: It is now commonly referred to the genus Camellia.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
Thea
n 1: (Greek mythology) the Titaness who was mother of Helios and
Selene and Eos in ancient mythology [syn: Thea, Theia]