Corollary

kawr-uh-ler-ee, kor-; especially Brit., kuh-rol-uh-ree, (kôr'ə-lěr'ē)
- noun
1. A proposition that follows with little or no proof required from one already proven.
2. A deduction or an inference.
3. A natural consequence or effect; a result.

The Back Story
I can't remember the exact context. Yet again it happened in the Twitterverse. Something was said that I didn't understand. The lack of my understanding of this word was the reason. It won't happen again.