mosquito
n. countable A2 Elementary US //məˈskitoʊ// UK //məskˈiːtəʊ// mos·qui·to
n. a small flying insect that bites people and animals to drink their blood. The bite usually leaves a red, itchy bump on your skin.
n. a slender, long-legged dipterous insect of the family Culicidae. The female possesses a proboscis adapted for piercing the skin of animals and humans to extract blood.
A mosquito bit me on the arm last night.
We decided to sit inside because there were too many mosquitoes near the lake at sunset.
While most species are merely a nuisance, certain mosquitoes act as primary vectors for serious diseases such as malaria, yellow fever, and the Zika virus in tropical regions.
Usage
The plural can be spelled as 'mosquitoes' or 'mosquitos', though the former is more common in standard English.