A severe or even fatal form of vaccinia occurring as a complication of smallpox vaccination chiefly in persons with an immunologic deficiency or dyscrasia, characterized by progressive enlargement of the initial and secondary lesions.
Can You Untangle These Regional Mix-Ups?Watch what you say while you're traveling around the US - not all words mean the same things in the same places.
Present, Past, And Sometimes Perfect ParticiplesParticiples are words derived from verbs that can function as adjectives or as parts of verb phrases to create verb tenses. The two main types of participles are the present participle and the past participle. The perfect participle depends on the past participle for its forms. Participial phrases function as adjectives that modify the subjects or other nouns in sentences. The Present Participle Adding -ing …
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.