Palatal a. : Of or pertaining to the palate; palatine; as, the palatal bones.

Palatal a. : Uttered by the aid of the palate; -- said of certain sounds, as the sound of k in kirk.

Palatal n. : A sound uttered, or a letter pronounced, by the aid of the palate, as the letters k and y.

Example:
How large is the gap in your front two teeth from a Palatal expander?

Taxonomy
languages, Palatal consonant, articulation, palatal consonants, palatal, free encyclopedia, The Sounds of the World's Languages, IPA, tip of the tongue, plosive, postalveolar, hard palate, contrast, palatals, search, alveolo-palatal, body, tongue.

Defination from the web:
Palatal consonants are consonants articulated with the body of the tongue raised against the hard palate (the middle part of the roof of the mouth) ... In phonology, palatalized, alveolo-palatal, palatoalveolar and postalveolar consonants are commonly grouped as palatals, since these categories ...