Here are some possibilities:
* Misspelling of a real word: It could be a misspelling of a word like "mology," which is a suffix meaning "the study of," often used in scientific terms. For example, "geology" means the study of the Earth.
* A specific term in a particular field: There's a chance it could be a specialized term in a specific field like a niche scientific discipline or even a fictional field.
* A word with a unique meaning: It's possible someone invented the word "malology" and gave it their own definition.
To understand what "malology" means, you would need more context. Please provide more information about where you encountered this word.