Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of pentagonal is as below...

Sea Pincushion :: Sea pincushion () A pentagonal starfish.

Pentagonally :: Pentagonally (adv.) In the form of a pentagon; with five angles.

Pentagonal :: Pentagonal (a.) Having five corners or angles.

Pentagonous :: Pentagonous (a.) Pentagonal.

Pyritohedron :: Pyritohedron (n.) The pentagonal dodecahedron, a common form of pyrite..

Asteridea :: Asteridea (n. pl.) A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal.

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