1. the most common flea attacking humans
The Collaborative International Dictionary of English v.0.48:
Flea \Flea\, n. [OE. fle, flee, AS. fle['a], fle['a]h; akin to
D. vtoo, OHG. fl[=o]h, G. floh, Icel. fl[=o], Russ. blocha;
prob. from the root of E. flee. [root]84. See Flee.]
An insect belonging to the genus Pulex, of the order
Aphaniptera. Fleas are destitute of wings, but have the
power of leaping energetically. The bite is poisonous to most
persons. The human flea (Pulex irritans), abundant in
Europe, is rare in America, where the dog flea
(Ctenocephalides canis, formerly Pulex canis) and the
smaller cat flea (Ctenocephalides felis) take its place.
See Aphaniptera, and Dog flea. See Illustration in
A flea in the ear, an unwelcome hint or unexpected reply,
annoying like a flea; an irritating repulse; as, to put a
flea in one's ear; to go away with a flea in one's ear.
Beach flea, Black flea, etc. See under Beach, etc.
WordNet (r) 3.0 (2006):
n 1: the most common flea attacking humans