Wordnet 3.0
NOUN (1)
1.
thin epithelial membrane lining the ventricles of the brain and the spinal cord canal;
The Collaborative International Dictionary of English v.0.48:
Ependyma \Ep*en"dy*ma\, n. [NL., fr. Gr. ? an upper garment;
'epi` upon + ? a garment; ? in + ? to put on.] (Anat.)
The epithelial lining of the ventricles of the brain and the
canal of the spinal cord; endyma; ependymis.
[1913 Webster]
WordNet (r) 3.0 (2006):
ependyma
n 1: thin epithelial membrane lining the ventricles of the brain
and the spinal cord canal