A widely accepted belief or theory is an orthodoxy. You could call the scientific theory of gravity an orthodoxy, since it's generally considered to be an established fact.

The word orthodoxy comes from the Greek root words orthos, which means right, true or straight, and doxa, opinion. So orthodoxy describes the one true opinion. The noun orthodoxy, pronounced "OR-thuh-dock-see," is most commonly used to talk about religious beliefs. When you conform to the orthodoxy of a particular religion, you follow its accepted doctrines, like a Christian's belief in an all-powerful God.

Definitions of orthodoxy

n the quality of being orthodox (especially in religion)

heterodoxy, unorthodoxy
the quality of being unorthodox
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convention, conventionalism, conventionality
orthodoxy as a consequence of being conventional
traditionalism, traditionality
strict adherence to traditional methods or teachings
conformity, ossification
hardened conventionality
academicism, academism, scholasticism
orthodoxy of a scholastic variety
Type of:
the quality of being unoriginal

n a belief or orientation agreeing with conventional standards

heresy, heterodoxy, unorthodoxy
any opinions or doctrines at variance with the official or orthodox position
conformism, conformity
orthodoxy in thoughts and belief
conformity with conventional thought and behavior
strict conformity to the letter of the law rather than its spirit
Type of:
an integrated set of attitudes and beliefs

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