单词	trigonous
释义	trigonous /ˈtrɪɡənəs / adjective chiefly 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). Hermaphrodite flowers; ovary 3-3.5 cm. long, 1-1.5 cm. wide, rather acutely trigonous or 4-sided according to position. One is African and supported by trigonous ovary in transverse section. Origin Early 19th century: from Greek trigōnos (see trigon).
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