Definition of trigonous in English:

trigonous

adjective

Botany
  • Triangular in cross section.

    ‘the seeds are trigonous’
    • ‘Seeds are extremely small, being less than 1 mm in size, with a wide variety of shapes (ellipsoid, oblongoid, ovoid, globose, trigonous or tetragonous).’
    • ‘One is African and supported by trigonous ovary in transverse section.’
    • ‘In superior view the fruits are markedly trigonous with three obtuse angles.’
    • ‘Hermaphrodite flowers; ovary 3-3.5 cm. long, 1-1.5 cm. wide, rather acutely trigonous or 4-sided according to position.’

Origin

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

Pronunciation:

trigonous

/ˈtrɪɡənəs/