If you're looking for the word 'estomic' in an English dictionary, you won't find it. It's not a recognized term. Most likely, it's a simple misspelling of a common word related to the digestive system.

The most probable intended word is stomach.

Another, less common possibility is a misspelling of emetic. An emetic is a substance that causes vomiting. While different from stomach, the two are clearly related, as an emetic's primary function is to empty the stomach's contents.

Sometimes, confusion arises from words in other languages. The word 'estomic' closely resembles the Portuguese word for stomach.

So, while 'estomic' isn't an English word, it could easily be a typo for 'stomach', 'emetic', or a reference to the Portuguese 'estômago'. The correct meaning depends entirely on the context where you saw it.