According to the dictionary, "creationism" fits some definitions of "theory."
the?o?ry
Audio Help /ˈθi
ə
ri, ˈθɪər
i/ Pronunciation Key - Show Spelled Pronunciation[
thee-
uh-ree,
theer-ee] Pronunciation Key - Show IPA Pronunciation –noun, plural -ries. 1.a coherent group of general propositions used as principles of explanation for a class of phenomena: Einstein's theory of relativity. 2.a proposed explanation whose status is still conjectural, in contrast to well-established propositions that are regarded as reporting matters of actual fact. 3.Mathematics. a body of principles, theorems, or the like, belonging to one subject: number theory. 4.the branch of a science or art that deals with its principles or methods, as distinguished from its practice: music theory. 5.a particular conception or view of something to be done or of the method of doing it; a system of rules or principles. 6.contemplation or speculation. 7.guess or conjecture.
American Heritage:
- A set of statements or principles devised to explain a group of facts or phenomena, especially one that has been repeatedly tested or is widely accepted and can be used to make predictions about natural phenomena.
- The branch of a science or art consisting of its explanatory statements, accepted principles, and methods of analysis, as opposed to practice: a fine musician who had never studied theory.
- A set of theorems that constitute a systematic view of a branch of mathematics.
- Abstract reasoning; speculation: a decision based on experience rather than theory.
- A belief or principle that guides action or assists comprehension or judgment: staked out the house on the theory that criminals usually return to the scene of the crime.
- An assumption based on limited information or knowledge; a conjecture.