Medical Definition of peltatin
: either of two lactones that occur as glycosides in the rootstock of the mayapple (Podophyllum peltatum) and have some antineoplastic activity:
b
or β-peltatin \
ˈbāt-ə-, chiefly British ˈbēt-ə-
\
: one C22H22O8 containing only one hydroxyl group with the other replaced by a methoxyl group
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Merriam-Webster unabridged
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