An Etymological Dictionary of Astronomy and Astrophysics

1. (n.) General: The shape and structure of something as distinguished from its material.
   Philosophy: The structure, pattern, organization, or essential nature of anything. Structure or pattern as distinguished from matter.
   Logic: The abstract relations of terms in a proposition, and of propositions to one another.
   
2. (v.intr.) of form.
   
3. (v.tr.) of form.

Etymology (EN): From O.Fr. forme, from L. forma “form, mold, shape, case,” origin unknown.

Etymology (PE): 1) Dis, disé “form, appearance,” variants -diz, -diš (tandis “body form, like a body; effigy;” mâhdis “moon-like;” šabdiz “night color; a horse of dark rusty color;” andiš- “to think, contemplate”), from Mid.Pers. dêsag “form, appearance,” dêsidan “to form, build;” Av. daēs- “to show,” daēsa- “sign, omen;” cf. Skt. deś- “to show, point out;” PIE *deik- “to show” (cf. Gk. deiknumi “to show,” dike “manner, custom;” L. dicere “to utter, say;” O.H.G. zeigon, Ger. zeigen “to show;” O.E. teon “to accuse,” tæcan “to teach”).
2) and 3) corresponding infintives of dis, as above.