SELEN-

I. combining form

or seleno- also seleni-

Etymology: Latin selen-, from Greek selēn-, from selēnē moon; akin to Greek selas light, brightness, Latin sol sun — more at solar

: moon : crescent-shaped

seleno morphic

Seleni cereus

Selen arctos

II. combining form

or seleni- or seleno-

Etymology: Swedish, from New Latin selenium

1. : selenium

selen ic

seleni ferous

seleno bismuthite

2. usually seleno- : containing bivalent selenium usually in place of oxygen

seleno cyanic

— compare thi-