Definition of papilionaceous in English:

papilionaceous

Syllabification: pa·pil·i·o·na·ceous
Pronunciation: /pəˌpilēəˈnāSHəs
 
/

adjective

Botany
Of, relating to, or denoting leguminous plants of a group (subfamily Papilionoideae or family Papilionaceae) with flowers that resemble a butterfly.
More example sentences
  • The flowers have a typical papilionaceous corolla.
  • Flowers of normal plants are typically papilionaceous with a large standard petal, two free-wing petals, and two fused-keel petals.
  • The corolla of Trigonellinae is typically papilionaceous, comprising a standard petal, two wing petals and a keel made up of two marginally fused petals.

Origin

mid 17th century: from modern Latin Papilionaceae (plural), based on Latin papilio 'butterfly', + -ous.

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Word of the day anomalous
Pronunciation: əˈnɒm(ə)ləs
adjective
deviating from what is standard, normal, or expected