Blooms of an apricot. The apricot is a small tree, 8â12 m (26â39 ft) tall, with a trunk up to 40 cm (16 in) in diameter and a dense, spreading canopy. The leaves are ovate, 5â9 cm (2.0â3.5 in) long and 4â8 cm (1.6â3.1 in) wide, with a rounded base, a pointed tip and a finely serrated margin.
1. (Mathematics) a solid figure having 20 faces. The faces of a regular icosahedron are equilateral triangles. [C16: from Greek eikosaedron, from eikosi twenty + -edron-hedron]. (aÉªËkoÊ sÉËhi drÉn, aÉªËkÉs É-). n., pl. -drons, -dra (-drÉ).
Octagonal prism. In geometry, the octagonal prism is the sixth in an infinite set of prisms, formed by square sides and two regular octagon caps. If faces are all regular, it is a semiregular polyhedron.