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1) of, relating to, or resembling the tongue
2) lying near or next to the tongue <a \lingual blood vessel> esp relating to or being the surface of a tooth next to the tongue
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adj.
relating to, situated close to, or resembling the tongue (lingua). The lingual surface of a tooth is the surface adjacent to the tongue.
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lin·gual (lingґgwəl) [L. lingualis] 1. pertaining to or toward the tongue; called also glossal. 2. in dental anatomy, pertaining to the tooth surface directed toward the tongue (oral cavity); see facies lingualis dentis. Called also oral.Medical dictionary. 2011.