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Gram-variable

American

[gram-vair-ee-uh-buhl] / ˈgræmˈvɛər i ə bəl /

adjective

(often lowercase)

of or relating to bacteria that stain irregularly with Gram's stain, being neither Gram-positive nor Gram-negative.

First recorded in 1955–60; see origin at Gram's method

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023