D defs.my
Entry 1 sense Webster, 1913

Compo

/käm'-pōˌ/ · Com·po · IPA /kɒm.pəʊ/
01 n. Short for Composition; -- used, esp. in England, colloq. in various trade applications;
pl. -pos ((#))
  1. 1.
    Short for Composition; -- used, esp. in England, colloq. in various trade applications; See: Composition