[ thrŏm′bō-sī′tăs-thēnē-ə ]


A group of hemorrhagic disorders in which the platelets may be within or only slightly below the normal numerical range but are morphologically abnormal or are lacking in factors that are effective in the coagulation of blood.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.