Noun
ATRA (uncountable)
Initialism of all-trans retinoic acid.
Atra esterni' ono thelduin Mor' rana li'fa unin hjarta onr Un du evari'nya ono varda (May good fortune rule over you peace live in your heart may the stars watch over you) Christopher Paolini
Atra gulai un ilian tauthr ono un atra ono waise skolir fra rauthr. - Let luck and happiness follow you and may you be shielded from misfortune. Christopher Paolini
Although it is known that 40 mg of isotretinoin will break down to an equivalent of 10 mg of ATRA — the mechanism of action of the drug (original brand name Accutane) remains unknown and is a matter of some controversy. Source: Internet
The Afghanistan Telecom Regulatory Authority (ATRA) has transferred 878 million Afghanis ($11.3mn) to the special account of the Ministry of Finance to be spent through the national budget. Source: Internet