Dictionary:

lingual

  (lĭng'gwəl)

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1. Of, relating to, or situated near the tongue or a tonguelike organ.
2. Linguistics. Pronounced with the tongue in conjunction with other organs of speech.
3. Of languages; linguistic: lingual diversity.

A sound, such as (t), (l), and (n), that is pronounced with the tongue and other organs of speech.

Pertaining to the tongue.

1. Of or relating to the tongue or any tonguelike part; glossal.
2. Next to or toward the tongue.

Pertaining to or near the tongue.

• l. bone — hyoid bone.
• l. swellings — primordia of the tongue, the median swelling and the distal and proximal swellings arise from the ventral aspect of the stomodeum.

The adjective has 2 meanings:

Meaning #1: consisting of or related to language
  Synonym: linguistic
  Pertains to noun: language (meaning #1)

Meaning #2: pertaining to or resembling or lying near the tongue
  Pertains to noun: tongue (meaning #1)