Any of several plants of the genus Dryas; the mountain avens. / One of two periods of cold and increased glaciation thousands of years before the present (Younger Dryas and Older Dryas).

Any plant which twines about a support.

Someone who plays the theremin.

Someone or something that puffs. / Any of several poisonous fish, of the family Tetraodontidae, which have the ability to inflate their bodies when in danger. / A manually-operated inhaler.