The root "lingu/o" means "tongue," as in the "sublingual" (under the tongue).

What does the Latin root lingu mean?

Lingu istic: via the Latin root words lingu a: "tongue, language,"-ist (one who performs a certain action) and -ic (of or pertaining to).

What does the medical term gloss mean?

gloss(o)- Also glott(o)‑. The tongue; speech or language. ... Some examples are medical terms, such as glossitis, inflammation of the tongue, and glossodynia (Greek odunē, pain), pain in it. The adjective glossopharyngeal refers to a nerve that controls both the tongue and pharynx.