Angular -- Having projecting longitudinal angles. Ridged lengthwise. (Latin, angulosus)
Channelled -- Canaliculate, having a U-shaped cross section. (Latin, canaliculatus)
Keeled -- Carinate, having a V-shaped cross section. (Latin, carinatus)
Plane -- Perfectly level or flat surface. (Latin, planus)
Spiral -- Twisted like a corkscrew. (Latin, spiralis)
Terete -- Opposite of angular; smoothly rounded. Cylindrical or threadlike. (Latin, teres)
Thread-like -- Slender like a thread. (Latin, filiformis)
Cordate -- Heart-shaped. (Latin, cordatus)
Hastate -- Shaped like a halbert head. (Latin, hastatus)
Lanceolate -- narrowly elliptical, tapering equally to both ends. (Latin, lanceolatus)
Linear -- Narrow, with opposite margins parallel. (Latin, linearis)
Oval -- Elliptical, bluntly rounded at each end. (Latin, ellipticus)
Ovate -- Oblong or elliptical, broadest at the base, pointed at the tip. (Latin, ovatus)
Reniform -- Kidney-shaped (Latin, reniformis)
Undulate -- Having wavy margins. (Latin, undulatus)
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Last revised: 30 December 2011
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