How to spell BIOYT correctly?

"Bioyt" may be a misspelling of "biot", "biota", "biotron" or "biotype". Each of these words could be applicable depending on the context. Biot refers to a highly erosion-resistant clay deposit, biota refers to the flora and fauna of a particular region, biotron is a type of laboratory, and biotype refers to a group of organisms that share certain genetic characteristics.