| complex | (noun) a whole structure (as a building) made up of interconnected or related structures | Synonyms: building complex |
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| (noun) a conceptual whole made up of complicated and related parts | Synonyms: composite |
| (noun) (psychoanalysis) a combination of emotions and impulses that have been rejected from awareness but still influence a person's behavior | - |
| (noun) a compound described in terms of the central atom to which other atoms are bound or coordinated | Synonyms: coordination compound |
| duplex | (noun) an apartment having rooms on two floors that are connected by a staircase | Synonyms: duplex apartment |
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| (noun) a house with two units sharing a common wall | Synonyms: duplex house, semidetached house |
| googolplex | (noun) a cardinal number represented as 1 followed by a googol of zeros (ten raised to the power of a googol) | - |
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| multiplex | (noun) a movie theater that has several different auditoriums in the same building | - |
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| (noun) communicates two or more signals over a common channel | - |