Here's what's likely happening:
* Misspelling: It's possible you're thinking of a word like "alloy," which refers to a mixture of metals.
* Technical Term: It could be a term used in a specific field like chemistry, geology, or metallurgy. If you provide more context, I might be able to help figure out what it means.
Can you provide more information?
For example:
* Where did you encounter this word? (a book, website, conversation, etc.)
* What was the context surrounding the word?
With more context, I can try to understand what "alloid" might refer to.