Protogenes, a Greek painter of the time of Alexander the Great, born in Caria; lived chiefly at Rhodes; was discovered by Apelles, who brought him into note; his masterpiece is a picture of Ialysus, the tutelary hero of Rhodes, on which he spent seven years, and which he painted four times over.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Proteus * Protoplasm