abruptly : Idioms & Phrases
Abruptly pinnate
(Bot.) , pinnate without an odd leaflet, or other appendage, at the end.
Webster 1913
abruptly-pinnate
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adjective satellite (of a leaf shape) pinnate with a pair of leaflets at the apex
even-pinnate; paripinnate.
WordNet
abruptly-pinnate leaf
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noun a pinnate leaf with a pair of leaflets at the apex
even-pinnate leaf.