Final answer:
The term 'Arrow to RPD clasp cervical to HOC' in prosthodontics refers to the position of the RPD clasp being cervical or below the largest circumference of the tooth, called the Height of Contour (HOC).
Step-by-step explanation:
The question you've asked pertains to the field of prosthodontics, which is a branch of dentistry. An RPD (Removable Partial Denture) clasp is a component of a denture used to provide retention by partly encircling a tooth. When the term cervical is mentioned in relation to a clasp and the HOC (Height of Contour), it is referring to the position of the clasp arm in relation to the tooth. The HOC is the largest circumference of the tooth usually at or near the gum line, and in this case, 'cervical to HOC' would mean that the clasp arm is positioned closer to the neck of the tooth, below the HOC.