An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The identities, and relative abundances of the → chemical elements or → compounds that make up a substance.

→ chemical; → composition.

1) General: The act or manner of composing; the result or product of composing.
2) Chemistry: The proportion of the elements of which a substance is made up.
3) Mechanics: The determination of a force whose effect is the same as that of two or more given forces acting simultaneously.

Hamnehesh, from ham-, → com-, + neheš verbal noun from nehâdan "to put, place," → compose.

The process or the state of breaking down a physical entity or an organic material.

From → de- + → composition.