Final answer:
The combining form blephar(o) refers to the eyelid; hence the correct answer is d. Eyelid.
Step-by-step explanation:
The combining form blephar(o) is associated with the eye specifically, it refers to the eyelid. This term is used in various medical conditions and surgical procedures related to the eyelids. For example, blepharitis is a common condition indicating inflammation of the eyelids. Given the options provided, the closest definition to blephar(o) is d. Eyelid.