a. [f. prec. + -AR.] Of, pertaining to, of the nature of, or characteristic of a fibrilla or fibrillæ.
1847–9. R. B. Todd, The Cyclopædia of Anatomy and Physiology, IV. 119/2. Fibrillar substance occurs in Growths in many varieties of form.
1859. W. B. Carpenter, Anim. Phys., i. (1872), 33. The coagulum or clot being distinguished from that of albumen or fibrin by the fibrillar arrangement of its particles.
