Hoop"er (?), n. [See 1st Hoop.]
One who hoops casks or tubs; a cooper.
© Webster 1913.
Hoop"er (?), n. Zool. [So called from its note.]
The European whistling, or wild, swan (Olor cygnus); -- called also hooper swan, whooping swan, and elk.
© Webster 1913.