Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Origin: Past participle of compoun 'to compound' (14-17 centuries), from Old French componre, from Latin componere; COMPOUND2

compound

3 adjective
     
com‧pound3 technical
1

compound eye/leaf etc

a single eye, leaf etc that is made up of two or more parts [↪ simple]
2

compound noun/adjective etc

a noun, adjective etc that is made up of two or more words. For example, 'ice cream' is a compound noun
3

compound sentence

a sentence that has two or more main parts [↪ complex sentence]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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