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Planetoid

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• Planetology

  [plan-i-tol-uh-jee] /ˌplæn ɪˈtɒl ə dʒi/ noun 1. the branch of astronomy that deals with the physical features of the . /ˌplænɪˈtɒlədʒɪ/ noun 1. (astronomy) the study of the origin, composition, and distribution of matter in the planets

• Plane-tree

  noun 1. any tree of the genus Platanus, especially P. occidentalis, the buttonwood or sycamore of North America, having palmately lobed leaves and bark that sheds. noun 1. any tree of the genus Platanus, having ball-shaped heads of fruits and leaves with pointed lobes: family Platanaceae. The hybrid P. × acerifolia (London plane) is frequently […]

• Plane-trigonometry

  noun, Mathematics. 1. the branch of trigonometry dealing with plane triangles.

• Planet-struck

  [plan-it-struhk] /ˈplæn ɪtˌstrʌk/ adjective 1. affected adversely by the supposed influence of a planet. 2. stricken with terror; panic-stricken. adjective 1. (astrology) affected by the influence of a planet, esp malignly

• Planet-x

  [eks] /ɛks/ noun, Astronomy. 1. a planet (beyond the orbit of the dwarf planet Pluto) whose existence has been hypothesized but not confirmed.

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