(neurology) An axon that lays down the initial growing path for the other axons of the same neuron to follow.

plural of axeman

plural of axel

(geometry) The longest diameter of an ellipse, running through the center and foci, with its ends being the widest points of the shape. / (geometry) The diameter of a circle.

(geometry) Half of the major axis of a circle or ellipse. / (geometry) Half of the distances between the two branches of a hyperbola.

(anatomy) The longitudinal lobe found in various crustacea, fish and arthropods, running down the centre of the animal.

Alternative spelling of axe head

plural of axehead

Without other living organisms.

(uncountable) The process of isolating a particular organism from all others. / (countable) An instance of this process.