革兰氏染色法

gé lán shì rǎn sè fǎ

Gram stain (used to distinguished two different kinds of bacteria)

animal hide

lán

abbr. for Lanzhou 蘭州|兰州[Lan2 zhou1], Gansu

shì

(bound form) family name; surname (as in 王氏[Wang2 shi4] "the Wang clan")

rǎn

to dye

color

old variant of 法[fa3]