Definition of rhinal :
1. Having a quality imparted by means of the nose; and specifically, made by lowering the soft palate, in some cases with closure of the oral passage, the voice thus issuing ( wholly or partially) through the nose, as in the consonants m, n, ng ( see Guide to Pronunciation, // 20, 208); characterized by resonance in the nasal passage; as, a nasal vowel; a nasal utterance.
2. Og or pertaining to the nose or olfactory organs.