Meaning

noun an oxide containing five atoms of oxygen in the molecule

originEtymology tree Proto-Indo-European *pénkʷe Proto-Hellenic *pénkʷe Ancient Greek πέντε (pénte) Ancient Greek πεντᾰ- (pentă-)lbor. English penta- Proto-Indo-European *h₂eḱ-der.? Ancient Greek ὀξύς (oxús) Proto-Indo-European *ǵenh₁- Proto-Indo-European *-os Proto-Indo-European *ǵénh₁os Proto-Hellenic *génos Ancient Greek γένος (génos) French oxygène Proto-Indo-European *h₂eḱ- Proto-Indo-European…

Etymology from Wiktionary, CC BY-SA 3.0