from
The Collaborative International Dictionary of English v.0.48
Crotonic \Cro*ton"ic\ (kr?-t?n"?k), a.
Of or pertaining to, or derived from, a plant of the genus
{Croton}, or from croton oil.
[1913 Webster]
{Crotonic acid} (Chem.), a white crystalline organic acid,
{C3H5.CO2H}, of the ethylene, or acrylic acid series. It
was so named because formerly supposed to exist in croton
oil. Also, any acid metameric with crotonic acid proper.
[1913 Webster]
Note: The acid characteristic of croton oil is tiglic or
tiglinic acid, a derivative of {crotonic acid}.
[1913 Webster]