linguo-, lingu-, lingua-, -linguist, -linguistic, -linguistical, -linguistically +

(Latin: literally tongue; and by extension, speech, language)

From Old Latin dingua which is a cognate (kindred) with Old English tunge, The change of d (in Old Latin dingua) to l (in Latin lingua) was probably due to dialectal influence (the so-called "Sabine l"). It was facilitated by a folk-etymological association with lingere, "to lick", the tongue having been conceived as "the licking organ".

—According to Dr. Ernest Klein in his
A Comprehensive Etymological Dictionary of the English Language
The science of language, especially of the elements, modifications, and structural and relativistic aspects of units of speech; or the study of a particular language.

Speakers of English may say, "What is his native tongue?" meaning language, and those who spoke Latin used lingua with the same figurative application. A linguist, then, is thought to be someone who speaks several languages fluently and is also known as a polyglot, literally, "many tongues".

Usually, when this person was bilingual; the next step probably was to be trilingual or even multilingual. From these stages of language development, we know that this person has learned diction, wording styles, idioms, phrasing, and vocabulary; as well as slang, jargon, and dialect because that is what linguistics is all about.

lingula (sing); lingulae (pl)
A tongue-shaped process, especially lingula cerebelli; a tonguelike process of the cerebellum prolonged forward on the upper surface of the superior medullary velum.
lingulae (plural)
Pertaining to a lingula.
lingulate, lingulated
Shaped like the tongue.
Surgical removal of the lingula of the upper lobe of the left lung.
linguo-, -linguist
Almost all of us have a tongue that relates to linguistic words which refers to language and the tongue.
Pertaining to or formed by the lingual and axial walls of a tooth cavity.
A reference to the lingual surface of the neck of a tooth.
Angulation of a tooth in its vertical axis toward the tongue.
linguoclusion (s) (noun), linguoclusions (pl)
Malocclusion in which a tooth is lingual to the line of the normal dental arch: "When the dentist checked his patient's teeth, he noticed a displacement, or linguoclusion, of a tooth that was pointing abnormally towards the tongue."
Relating to the tongue and teeth, such as the speech sound "th" which is produced with the aid of the tongue and teeth.
Concerning the tongue and the gingiva, or pertaining to the lingual and gingival walls of a cavity preparation.
1. A reference to, pertaining to, letters or sounds that are formed by the tongue and lips.
2. A letter or an articulation that is produced by a combination of the tongue and lips.
Displacement of a tooth toward the tongue.
Cross references of word families related directly, or indirectly, to: "talk, speak, speech; words, language; tongue, etc.": cit-; clam-; dic-; fa-; -farious; glosso-; glotto-; lalo-; locu-; logo-; loqu-; mythico-; -ology; ora-; -phasia; -phemia; phon-; phras-; Quotes: Language,Part 1; Quotes: Language, Part 2; Quotes: Language, Part 3; serm-; tongue; voc-.