(chemistry) monatomic hydrogen that exists transiently after the reduction of a hydrogen ion; generated from zinc and hydrochloric acid; it is a strong reducing agent

(sports) Acronym of National Association for Stock Car Auto Racing, a U.S. auto racing organization.

(botany) relating to a nastic change

A city, the county seat of Davidson County, Tennessee. / The capital city of Tennessee. / (metonymically) The country music industry. / A city, the county seat of Howard County, Arkansas.

The Nashville warbler, Leiothlypis ruficapilla.

(music) A subgenre of country music that became popular in the 1950s and 1960s, containing elements of popular music and characterized by electronic string sections, background vocals, and orchestras.

(microbiology, biochemistry) Initialism of nucleic acid sequence-based amplification: a transcription-based isothermal nucleic acid amplification technique.

(US) Initialism of National Association of State Boards of Accountancy.

In a nasty manner.

(rare) Birth. / Coming into being; inception, beginning.