Etymology of the English word Arcturus
the English word
Arcturusderived from the Latin word
Arcturus (Acturus, brightest star in Bootes; the whole constellation)
derived from the Greek word
Arktourosderived from the Greek word
arktos, ἄρκτος (a bear (as obstructing by ferocity))
derived from the Proto-Indo-European root
*r₀tko-Date
The earliest known usage of Arcturus in English dates from the 14th century.
