Virulent

vir'C-lent, adj. full of poison very active in injury bitter In enmity malignant. —adv. Vlr'ulently.— «. Vir'ulenoe. [From Virus.] Virus, vlr'ns, a slimy liquid contagious or poisonous matter (as of ulcers, .) the poison which causes infection: any foul, hurtful matter. [L cog with Gr. ios, Sans visitant, poison.]