whitehead

noun5

1. •
   A type of comedo, manifesting as a small whitish bump of the skin due to retention of sebum and dead skin cells in a skin pore blocked by a thin layer of epithelium.

   • Ruth knew that the whiteheads of her teenage acne were a temporary state of affairs, but that did nothing to quell her distress when an eruption hit just before prom.
2. •
   The blue-winged snow goose, Anser caerulescens caerulescens.
3. •
   The surf scoter duck.
4. •
   A species of passerine bird, endemic to New Zealand (Mohoua albicilla).
5. •
   A domestic pigeon of a particular breed; a white-tailed monk.

noun1

1. •
   A form of self-propelling torpedo.