An abnormally small red blood cell (less than 5 microns in diameter)

Wiktionary Word definitions in Wiktionary
n. an unusually small red blood cell found in some forms of anemia

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Microcyte \Mi"cro*cyte\, n. [Micro- + Gr. ? a hollow vessel.] (Physiol.) One of the elementary granules found in blood. They are much smaller than an ordinary corpuscle, and are particularly noticeable in disease, as in an[ae]mia.

Wikipedia Word definitions in Wikipedia
This is an abnormally sized red blood cell . By definition it is 5 micrometers or smaller in diameter. It is often associated with several forms of anemia . Microcyte - Not to be confused with the content management system from Microcyte CMS

WordNet Word definitions in WordNet
n. an abnormally small red blood cell (less than 5 microns in diameter)