(aerology, aerography, planetology) An ephemeral dark linear feature found on slopes that recurs seasonally.

plural of recurrent neural network

(machine learning) An artificial neural network where the connections between units give them a kind of internal memory useful for processing arbitrary sequences of inputs as in speech recognition.

(neuroanatomy) One of two branches of the vagus nerve that arises below the larynx, loops under the subclavian artery on the right side and under the arch of the aorta on the left, and returns upward to the larynx to supply all the muscles of the thyroid except the cricothyroid muscle.