Definify.com
Webster 1913 Edition
Fibrillary
Fi′bril-la-ry
(? or ?)
, Adj.
 Of of pertaining to fibrils. 
Definition 2025
fibrillary
fibrillary
English
Adjective
fibrillary (not comparable)
-  Of or pertaining to fibrils, or nanoscale fibers
- a fibrillary structure