Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Medieval Latin
Origin: heterogeneus, from Greek, from hetero- ( HETERO-) + genos 'type'

heterogeneous

 adjective
     
het‧e‧ro‧ge‧ne‧ous also het‧e‧rog‧e‧nous formal
consisting of parts or members that are very different from each other [≠ homogeneous]:
a heterogeneous collection of buildings
—heterogeneously adverb
—heterogeneity noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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