(biochemistry) Initialism of glycol nucleic acid.

plural of GNA

(Internet slang, text messaging) Abbreviation of gonna.

(transitive, intransitive) To bite something persistently, especially something tough. / (intransitive) To produce excessive anxiety or worry. / To corrode; to fret away; to waste.

the act of gnawing

(transitive) To grind (one's teeth) in pain or in anger. / (transitive) To grind between the teeth. / (figuratively) To clash together violently. / (Tyneside) To run away.

A sudden snapping of the teeth.

Any small insect of the order Diptera, specifically within the suborder Nematocera.

Initialism of Global Network of Arab Activists. / Initialism of Great North Air Ambulance. / Initialism of Gridless Narrow-Angle Astrometry. / Initialism of Guilford Native American Association.

Initialism of gridless narrow-angle astrometry.