competition

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com·pe·ti·tion

(kom'pĕ-tish'ŭn),
The process by which the activity or presence of one substance interferes with, or suppresses, the activity of another substance with similar affinities.
Farlex Partner Medical Dictionary © Farlex 2012

com·pe·ti·tion

(kom'pĕ-tish'ŭn)
The process by which the activity or presence of one substance interferes with, or suppresses, the activity of another substance with similar affinities.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

competition

the interaction between organisms striving for the same end, including competition for resources (food, living space), mates, etc. Such interaction may adversely affect their growth and survival. See INTERSPECIFIC COMPETITION, INTRASPECIFIC COMPETITION.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005