| phosphorus |
a substance that is a chemical element. One of the common forms of phosphorus is a poisonous yellow solid that glows in moist air. Phosphorus is important to living things. It is used in fertilizers to help plants grow. (symbol: P) |
| powder |
a mass of fine, loose grains that are made when a solid material has been ground or crushed. [2/5 definitions] |
| prism |
a solid glass or crystal object that light can pass through. It has three sides that are rectangles and two ends shaped like triangles. A prism splits a ray of light into the colors of the rainbow. [2 definitions] |
| pyramid |
a solid figure whose sides are triangles that meet at a single point. The base of a pyramid can be any flat shape with straight sides, such as a triangle or square. [1/3 definitions] |
| rock1 |
a solid mass made up of minerals. Rock forms much of the earth's outer layer, including cliffs and mountains. [1/3 definitions] |
| sediment |
solid material that settles to the bottom of a liquid. [1/2 definitions] |
| serum |
the thin, watery liquid that remains when the solid parts of blood have formed a clot. [1/2 definitions] |
| set |
to become hard or solid. [1/19 definitions] |
| sewer1 |
a large underground pipe that carries off the liquid and solid waste of a town or city. |
| shortening |
a solid fat used in baking. |
| sieve |
a tool used to separate solid from liquid or to separate smaller pieces of something from larger pieces. Sieves have small holes or wire mesh on the bottom. |
| silhouette |
an outline or side view of a person's head that is filled with a dark, solid color. [1/3 definitions] |
| slab |
a flat, wide, and thick piece of some solid. Rocks and foods can be slabs. |
| sound2 |
having a solid base. [1/4 definitions] |
| sphere |
a round, solid figure in which every point on the surface is an equal distance from the center. [1/2 definitions] |
| sturdy |
strong, hardy, or solid. |
| thaw |
to go from being a frozen solid to being a soft solid or a liquid. [1/4 definitions] |
| urine |
a substance made by the kidneys to carry waste out of the body. Urine comes out as a yellow liquid in mammals and as a partially solid substance in reptiles and birds. |
| vapor |
tiny particles of a liquid or solid in a gas. [2 definitions] |
| vertex |
the point where the sides of an angle or geometric solid come together. [1/2 definitions] |
| wax1 |
a solid yellow substance made by bees for building their honeycombs; beeswax. [1/4 definitions] |