Definition of polypus:
(n) :
(medicine) A polyp.
(n) :
An aquatic creature.
(n) :
(now rare) Any of various simple aquatic invertebrates having mouths surrounded by tentacles, including hydrozoa and anthozoa; including the sessile life stages of organisms whose corresponding free-swimming stage is the medusa.
(n) :
(obsolete) A tentacled cephalopod, such as an octopus, squid, or cuttlefish.
(n) :
(hematology, pathology) A cardiac thrombus usually found post-mortem.
(n) :
A medical phenomenon.