WordNet
calcarine sulcus
n. a sulcus in the mesial surface of the occipital lobe of the cerebrum [syn: calcarine fissure]
Wikipedia
Calcarine sulcus
The calcarine sulcus (or calcarine fissure) is an anatomical landmark located at the caudal end of the medial surface of the brain. Its name comes from the Latin "calcar" meaning "spur.". It is a complete sulcus.