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Flea
2005-09-08 11:45:51

PHOTO CAPTION: Scanning Electron Micrograph of a Flea (photo by Centers for Disease Control and Prevention (CDC) / Janice Carr) Flea is the common name for any of the small wingless insects of the order Siphonaptera. Fleas are external parasites, living by hematophagy off the blood of mammals and birds. Some well known flea species include: Cat Flea (Ctenocephalides felis), Dog Flea...

Word of the Day
pawl
  • A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.
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