Rima Oris refers to the opening or the mouth of the human skull. A few synonyms for Rima Oris include oral cavity, mouth, and buccal cavity. In medical terms, it is a crucial aspect while examining the oral hygiene and dental health of an individual. It is also an important part of anatomy that plays a significant role in breathing, digestion, and vocal communication. Other synonyms for Rima Oris are the oropharynx, stomatodaeum, and vestibule. It is important to note that maintaining proper oral hygiene, including daily brushing and flossing, can help prevent numerous dental and oral health problems.