big four(redirected from Big 6)
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big fourA popular term for the main 4 factors to consider when evaluating the psychological aspects of spatial relationships: personal space, territoriality, crowding, privacy.
Big FourA herpetology (the study of amphibians) term of art for any of the four commonly encountered venomous snakes seen in the Indian subcontinent: the common krait, Indian cobra, Russell's viper and saw-scaled viper (the last being the deadliest, given its aggressive nature and habitat near highly populated areas).
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