scaup Meaning, Definition & Usage

  1. noun diving ducks of North America having a bluish-grey bill
    scaup duck; bluebill; broadbill.

WordNet

Scaup noun
Etymology
See Scalp a bed of oysters or mussels.
Definitions
  1. A bed or stratum of shellfish; scalp. Scot.
  2. (Zoöl.) A scaup duck. See below.

Webster 1913