Share this entry

trigonous Line breaks: trig|on¦ous
Pronunciation: /ˈtrɪɡənəs/

Definition of trigonous in English:


chiefly Botany
Triangular in cross section: the seeds are trigonous
More example sentences
  • In superior view the fruits are markedly trigonous with three obtuse angles.
  • One is African and supported by trigonous ovary in transverse section.
  • Seeds are extremely small, being less than 1 mm in size, with a wide variety of shapes (ellipsoid, oblongoid, ovoid, globose, trigonous or tetragonous).


Early 19th century: from Greek trigōnos (see trigon).

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day fortissimo
Pronunciation: fɔːˈtɪsɪməʊ
(especially as a direction) very loud or loudly