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âº (of something unpleasant or dangerous) gradually and secretly causing harm: High blood pressure is an insidious condition which has few symptoms. Thesaurus: synonyms and related words. Dangerous and harmful. adverse.
Fastidious: complex nutritional or cultural requirements, making isolation and culture of a fastidious organism more difficult. Fauna: ecological term that generically refers to animals; flora generically refers to plants. Fermentation: the enzymatic breakdown of carbohydrates generally in the absence of oxygen