mosquito

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Any of numerous slender two-winged insects of the family Culicidae, having aquatic larvae and in the adult female a long proboscis, used in most species for sucking blood. Some species of mosquitoes transmit the pathogens that cause certain diseases, notably malaria, yellow fever, and dengue.

from The Century Dictionary.

• noun One of many different kinds of gnats or midges the female of which bites animals and draws blood.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Zoöl.) Any one of various species of gnats of the genus Culex and allied genera. The females have a proboscis containing, within the sheathlike labium, six fine, sharp, needlelike organs with which they puncture the skin of man and animals to suck the blood. These bites, when numerous, cause, in many persons, considerable irritation and swelling, with some pain. The larvæ and pupæ, called wigglers, are aquatic.
• noun a net or curtain for excluding mosquitoes, -- used for beds and windows.
• noun a fleet of small vessels.
• noun (Zoöl.) a dragon fly; -- so called because it captures and feeds upon mosquitoes.
• noun a loosely-woven gauzelike fabric for making mosquito bars.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun A small flying insect of the family Culicidae, known for biting and sucking blood, leaving an itching bump on the skin. However, only the female of the species bites animals and humans. They are known to carry diseases like malaria and yellow fever.
• verb To fly close to the ground, seemingly without a course.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun two-winged insect whose female has a long proboscis to pierce the skin and suck the blood of humans and animals