Final answer:
In the term trichiasis, the prefix trich- means hair.
Step-by-step explanation:
In the term trichiasis, the prefix trich- means hair. The term trichiasis refers to a condition in which the eyelashes grow inwards towards the eye, causing irritation and discomfort.
An example of a related term is trichome, which is a hair-like structure found on the surface of plant leaves. The prefix trich- in both trichiasis and trichome refers to hair. In the context of the medical term trichiasis, it specifically refers to abnormal growth of eyelashes.