Final answer:
The suffix 'osis' in the word dermatophytosis means a condition or disease caused by dermatophytes.
Step-by-step explanation:
The suffix 'osis' in the word dermatophytosis means a condition or disease. In this case, dermatophytosis refers to a fungal infection of the skin caused by dermatophytes, which are fungi that feed on keratin (a protein found in skin, hair, and nails). Examples of dermatophytosis include athlete's foot, ringworm, and jock itch.