5 letters · 11 points in Scrabble
noun a virus that is parasitic (reproduces itself) in bacteria
originFrom Ancient Greek -φάγος (-phágos, “eater”), from φαγ- (phag-), aorist stem of ἐσθίω (esthíō), ἔδω (édō, “to eat, to consume”).
Etymology from Wiktionary, CC BY-SA 3.0