Litmus

Definition:

• (n.) A dyestuff extracted from certain lichens (Roccella tinctoria, Lecanora tartarea, etc.), as a blue amorphous mass which consists of a compound of the alkaline carbonates with certain coloring matters related to orcin and orcein.

Compare litmus with other words:

litmus vs. lituus

erythrolitmin vs. litmus

litmus vs. turnsole

litmus vs. orcein

indicator vs. litmus

lacmus vs. litmus

lichen vs. litmus

dyestuff vs. litmus

base vs. litmus

acid vs. litmus