Biol. [f. CONSORT sb.1 + -ISM.] The practice of being consorts: in Biol. the association or union during life of two plants, or animals, or of a plant and animal, each of which is dependent on the other for its existence or well-being. In the case of animals more commonly called SYMBIOSIS.

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1880.  Jrnl. Linnæan Soc., XVIII. 148. This process tends to explain the nature of the consortism of the fungal and algal elements in the autonomous lichen.

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1885.  Encycl. Brit., XVIII. 266 (Parasitism). The fungi which are concerned in the constitution of lichens maintain with the algal components throughout life relations of consortism. Ibid., 268. Symbiosis … the consortism of organisms in such fashion that mutual services are rendered sufficient to make the alliance profitable … to the whole community of organisms.

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