Hi Slewi,
Try this, from Fr. Hardon’s Pocket Dictionary:
DOCTRINE. Any truth taught by the Church as necessary for acceptance by the faithful. The truth may be either formally revealed (as the Real Presence), or a theological conclusion (as the canonization of a saint), or part of the natural law (as the sinfulness of contraception). In any case, what makes it doctrine is that the Church authority teaches that it is to be believed. This teaching may be done either solemnly in ex cathedra pronouncements or ordinarily in the perennial exercise of the Church’s magisterium or teaching authority.
**DOGMAS ** are those doctrines which the Church proposes for belief as formally revealed by God. (Etym. Latin doctrina, teaching.)