Polyp vs Theca - What's the difference?

As nouns the difference between polyp and theca

is that polyp is polyp while theca is (biology) any external case or sheath.

(en noun)

(medicine) an abnormal growth protruding from a mucous membrane

(biology) a cylindrical coelenterate, such as the hydra, having a mouth surrounded with tentacles

* polypoid

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(en-noun)

(biology) Any external case or sheath.

(botany) The pollen producing organ usually found in pairs and forming an anther.

(medicine) The twin layers of cells surrounding the basal lamina of an ovarian follicle

(microbiology, planktology) The membrane complex enveloping the cells of certain plankton including diatoms and dinoflagellates

(coral science) The calcareous wall of a corallite, the exoskeleton of a coral polyp

{{der3, thecal , thecate , thecoma , epitheca , ootheca , gnathotheca , hypotheca , spermatheca , theca externa , theca interna , theca folliculi}}

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