class or division of people or things regarded as having particular shared characteristics.

fall of rain.

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.

To cause extensive destruction or ruin utterly.

three-dimensional figure symmetrical about each of three perpendicular axes, whose plane sections normal to one axis are circles and all other plane sections are ellipses. .

arrangement of and relations between parts or elements of something complex. The ways some things are built, arranged or organized. To make or build with an organized framework.

in space separating things. From one person, thing, or place, to another.

series of actions towards achieving something. Sets of changes that occur slowly and naturally. To prepare by treating something in a certain way.

From one end or side of something to the other. From the beginning of something until the end. By a particular way or process; by the use of.

With a high level of skill or development. To change or improve.

Device sent into space that aids communication.

To take control of a place or object by force.

To make something stronger or more extreme.

instance of structure collapsing. To fold (e.g. a stroller) down to make it smaller.