From The Collaborative International Dictionary of English v.0.48 :
Elaeagnus \E`l[ae]*ag"nus\, n. [NL., fr. Gr. ? a B[oe]otian
marsh plant; ? olive + ? sacred, pure.] (Bot.)
A genus of shrubs or small trees, having the foliage covered
with small silvery scales; oleaster.
[1913 Webster]
From WordNet (r) 3.0 (2006) :
Elaeagnus
n 1: oleaster [syn: Elaeagnus, genus Elaeagnus]