| planetary |
of, concerning, or like a planet or planets. [3 definitions] |
| planetesimal |
any of the numerous small bodies once thought to have orbited the sun and coalesced to form the planets. |
| planet-friendly |
of or pertaining to a product or process that causes minimal harm to the environment. |
| planet gear |
a gear that meshes with and describes a circular path around another gear, esp. in an epicyclic train; planet wheel. |
| planetoid |
an asteroid. |
| planet wheel |
see "planet gear." |
| plangent |
sounding deeply or loudly. [2 definitions] |
| planimeter |
a device that measures the area of a plane figure by tracing around its entire perimeter. |
| planisphere |
a maplike projection of all or part of a sphere on a plane surface. [2 definitions] |
| plank |
a length of wood similar to, but thicker than, a board. [4 definitions] |
| planking |
planks collectively. [2 definitions] |
| plankton |
free-floating, usu. microscopic plant and animal life found in fresh or salt water. |
| planless |
combined form of plan. |
| Planned Parenthood |
trademark for an organization that provides information on various methods of family planning such as birth control. |
| planner |
a person who plans, esp. one who plans the development of cities and towns. [2 definitions] |
| planning |
the act of figuring out how to do something ahead of time. |
| plano- |
flat. |
| plano-concave |
having one flat and one concave side, as a lens. |
| plano-convex |
having one flat and one convex side, as a lens. |
| planograph |
a print or impression produced from a flat surface. [2 definitions] |
| planography |
a process or method of printing directly from a flat surface. |