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

1) A chip or splinter.
2) To break up into small chips, flakes, or splinters, or to cause to break off in flakes.

M.E. spalle "a chip," verb spald "to split," from M.L.G. spalden, cognate with O.H.G. spaltan "to split."

Terišé "a chip," from tarâšidan "to cut, hew; scape; shave;" Mid.Pers. tâšitan "to cut, cleave; create by putting together different elements;" Av. taš- "to cut off, fashion, shape, create," taša- "axe" (Mod.Pers. taš, tišé "axe"), tašan- "creator;" cf. Skt. taks- "to form by cutting, tool, hammer, form," taksan- "wood-cutter, carpenter;" Gk. tekton "carpenter," tekhne "art, skill, craft, method, system;" L. textere "to weave;" PIE *teks- "to fashion."

A nuclear reaction in which a high energy particle that collides with a nucleus causes the target to eject several particles, thus changing both its mass number and its atomic number.

From → spall + -ation.

Verbal noun from terišidan, → spall.