<tumour> A neoplasm arising from abnormal hyperplasia of the prickle cell layer of the skin. ... Origin: para-+ G. Akantha, a thorn, + -oma, tumour ... (05 Mar 2000) ... 
Type: Term Pronunciation: par′ak-an-thō′mă Definitions: 1. A neoplasm arising from abnormal hyperplasia of the prickle cell layer of the skin.