Webster's Revised Unabridged Dictionary · 1913

Lactescence

Lactescence , noun

[Compare French lactescence.]

1.
The state or quality of producing milk, or milklike juice; resemblance to milk; a milky color.
This lactescence does commonly ensue when... fair water is suddenly poured upon the solution. — Boyle
2.
(Botany) The latex of certain plants. See Latex.