What term refers to ritual garments worn by clergy during ceremonies?

The term that refers to ritual garments worn by clergy during ceremonies is "vestments." This word specifically designates garments that are worn in the context of specific religious services or rituals, and they vary across different faiths and denominations. Vestments are often rich in symbolism and can denote various aspects of the liturgical season, the status of the wearer, or specific roles within the religious ceremony.

For instance, in Christian traditions, different types of vestments such as chasubles, stoles, and albs can signify the occasion's solemnity or the particular function of the clergy member. This makes "vestments" the most precise and contextually appropriate term for the garments referenced in the question, distinguishing them from more general terms like "apparels," "regalia," or "ceremonial wear," which lack the specific liturgical connotation.