Emily Dickinson Lexicon

CUCK'OO-SPIT, or CUCK'OO-SPIT-TLE, n.

A dew or exsudation found on plants, especially about the joints of lavender and rosemary. – Brown. Or a froth or spume found on the leaves of certain plants, as on white field-lychnis or catch-fly, called sometimes Spatling-poppy. – Encyc.