What is "crna"

abbr. cytoplasmic RNA

Crna or CRNA may refer to:

• Crna (river), a river in the Republic of Macedonia
• Črna na Koroškem, a municipality in Slovenia
• Certified Registered Nurse Anesthetist, a medical qualification in the United States
• cRNA, RNA derived from cDNA through standard RNA synthesis

The Crna , also Crna Reka is a river in the Republic of Macedonia, right tributary of the Vardar. It runs though much of the south and west of the country. Its source is in the mountains of western Macedonia, west of Kruševo. It flows through the village Sopotnica, and southwards through the plains east of Bitola. At Brod ( Novaci Municipality) it turns northeast, and it flows into the Vardar between Rosoman and Gradsko.

Thus, the river makes a bend of almost 180 degrees east of Bitola. This bend was part of the Macedonian Front in World War I. It was known to the allied forces as the Cerna Bend or Cerna Loop, and two major battles were fought here : the Battle of the Cerna Bend (1916) and the Battle of the Cerna Bend (1917).

The name Crna Reka means "Black river" in Macedonian, a translation of its earlier Thracian name, Erigon, meaning "black", akin to Greek érebos, "darkness"; Armenian erek, "evening"; Old Norse røkkr, "darkness"; Gothic riqis, "darkness"; Sanskrit rájas, "night"; Tocharian B orkamo, "dark".