fibrilliform

From fibril (“a fine fibre or filament”) +‎ -i- +‎ -form.

fibrilliform (comparative more fibrilliform, superlative most fibrilliform)

1. Having the appearance of a thin fibre or group of fibres; fibrous.
   • 1979, Dennis M. Lehmkuhl, How to Know the Aquatic Insects (The Pictured Key Nature Series), Dubuque, I.A.: Wm. C. Brown Company Publishers, →ISBN, page 53, column 1:

     Homoeoneuria burrows in loose sand and feeds on material caught in the hairs on the legs. Lachlania has both a platelike and a fibrilliform portion to the gills (Fig. 63B) while Homoeoneuria lacks the latter (Fig. 63C).

• “fibrilliform, adj.”, in OED Online ⁠, Oxford, Oxfordshire: Oxford University Press, launched 2000.