Definition of "fibrillary" [fi•bril•la•ry]

• Of or pertaining to fibrils, or nanoscale fibers (adjective)

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• "During surgery, Jack suffered a near-fatal stroke, but doctors were able to successfully remove 75-90 percent of the exposed tumor, an uncommon brain cancer called fibrillary astrocytoma, one of about 120 kinds of brain tumors."
• "Day, JR, et al. Gonadal steroids regulate the expression of glial fibrillary acidic proteins in the adult male rat hippocampus."
• "Stone, et al. Directional transcription regulation of glial fibrillary acidic proteins by estradiol in vivo and in vitro."