from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of various acids derived from the juice of Lactuca virosa.
from The Century Dictionary and Cyclopedia
- n. A bitter, acrid, brownish-green, amorphous compound obtained from the juice of Lactuca Canadensis.
- n. A light-yellow crystalline compound, C40H58O11(?), formed by the action of dilute sulphuric acid on lactcuarium. It gives a wine-red color with alkalis.
Lactuca + -ic + acid (Wiktionary)