nounAinmfhocal1physphysline of rotationaisfem2cmuthe Earth's axisais an Domhain2mathematicsmatamaiticbisecting lineaisfem2cmuaxis of symmetryais siméadrachta, ais na siméadrachtamajor axismór-aisminor axismion-aisprincipal axispríomh-ais3mathematicsmatamaiticin coordinate systemaisfem2cmu4central structureaisfem2cmu5historystair, polpolallianceaisfem2cmuthe Rome-Berlin AxisAis na Róimhe agus BheirlínSubformsSainfhoirmeacha→ the Axis