Gram-variable
[ gram-vair-ee-uh-buh l ]
/ 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.
Origin of Gram-variable
First recorded in 1955–60; see origin at
Gram's method