recurrent

Occurring or appearing again or repeatedly.

Turning in a reverse direction. Used of blood vessels and nerves.

In paleontology, reappearing without essential change in organic composition: used of faunas which reappear after their first disappearance from a given geological section, or of a species which thus returns after departure. The conception of recurrent faunas implies the fact of migration and temporary absence from a given geographical province with subsequent return thereto.

A recurrent verse.

Recurring; returning from time to time; reappearing; repeated: as, recurrent pains of a disease.

In crystallography, noting a crystal which exhibits an oscillatory combination of two sets of planes. See oscillatory.

In anatomy, turned back in its course, and running in a direction the opposite of its former one: specifically noting the inferior laryngeal branch of the pneumogastric. See the following phrases.

In entomology, turning back toward the base: as, a recurrent process.

A branch which is more or less turned toward the base of the wing, in a direction contrary to the nervure from which it arises. Many of these recurrent nervures are distinguished.

A vein of the wing which, after running toward the apex, is bent or curved back toward the base, as in many Coleoptera.