Definition of mosquito for English Language Learners. : a small flying insect that bites the skin of people and animals and sucks their blood.
What it is: Small-cap stock refers to a company with a market capitalization (calculated by taking a firm's current share price and multiplying that figure by the total number of shares outstanding) near the low end of the publicly traded spectrum.
You often hear companies or different mutual funds being categorized as small cap, mid cap or large cap. But what do these terms really mean? The cap part of these terms is short for capitalization, which is a measure by which we can classify a company's size.