Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: Latin
Origin: fastidiosus, from fastidium 'strong dislike'

fastidious

 adjective
     
fas‧tid‧i‧ous
very careful about small details in your appearance, work etc [= meticulous]:
people who are fastidious about personal hygiene
—fastidiously adverb
—fastidiousness noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.
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