As nouns the difference between lupini and lupinin
is that lupini is alternative form of lang=en edible legume seed of one of these plants while lupinin is a glucoside found in the seeds of several species of lupine.
lupini
English
Noun
(
en noun)
(edible legume seed of one of these plants).
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lupinin
English
Noun
(-)
(organic chemistry) A glucoside found in the seeds of several species of lupine.