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metalloporphyrin

[ mĭ-tăl′ō-pôrfə-rĭn ]
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n.
A compound, such as heme, formed by the combination of a porphyrin with a metal.
QUIZ
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Test how much you really know about regular and irregular plural nouns with this quiz.
Question 1 of 9
Which of the following nouns has an irregular plural form?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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