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

1) Suffix used in the names of subatomic particles (electron, proton, neutron, gluon, etc.), quanta (photon, graviton, etc.), and other minimal entities or components.
2) Suffix used in the meaning of inert gases (e.g. neon, krypton).

1) Probably extracted from → ion.
2) From Gk. -on, neuter of -os adj. ending.

A → spiral galaxy oriented edge-on to our view. → face-on galaxy.

→ edge; on, from O.E. on, variant of an "in, on, into" (cf. Du. aan; Ger. an; Goth. ana "on, upon"), from PIE base *ano "on" (cf. Av. ana "on;" Gk. ana "on, upon;" L. an-); → galaxy.

Kahkašân, → galaxy; pahlunemâ "showing the side," from pahlu, → side, + nemâ, from nemudan "to show, display," → display.

A → spiral galaxy oriented such that it is viewed from above or below. → edge-on galaxy.

→ face; → on-; → galaxy.

A relationship between two distinct sets of elements such that every member of the first set can be paired with a unique element in the second set; and every member of the second set can be paired with a unique element in the first set. Two sets so related are said to be isomorphic.

→ one; → correspondence.