acetocarmine
noun
ace·to·car·mine
¦a-sə-(ˌ)tō-ˈkär-mən,
-ˌmīn,
ə-ˌsē-tō-
plural -s
: a saturated solution of carmine in 45 percent acetic acid used especially for the rapid staining of fresh unfixed chromosomes
Word History
Etymology
acet- + carmine
First Known Use
1885, in the meaning defined above