festucine adjective 1noun 1forms 2 adjective1 •(no longer used) Of a straw colour; greenish-yellow.[…] laid Upon thy pouting lips the drench of wine! Above thy brow they massed the festucine Tresses and bound them with a mitra's braid — 1913 noun1 •Loline, an alkaloid with the formula C₈H₁₄N₂O.MS and NMR spectra of loline from L. cunneatum and festucine from Festuca arundinacea showed that both alkaloids are identical. — 1991 formsmore festucine · most festucine