Arc·tu·rus 
(ärk-trəs, -tyr-)
(ärk-trəs, -tyr-)n.
The fourth brightest star in the sky and the brightest star in the constellation Boötes, approximately 36 light years from Earth.
[Middle English, from Latin Arctūrus, from Greek Arktouros : arktos, bear; see tko- in the Appendix of Indo-European roots + ouros, guard (from its position behind Ursa Major); see wer-3 in the Appendix of Indo-European roots.]
- program
- program director
- programed
- programer
- programing
- programmability
- programmable
- programmatic
- programmatically
- programme
- programmed
- programmed cell death
- programmed instruction
- programmer
- programming
- programming language
- program music
- program trader
- program trading
- progress
- progression
- progressional
- progressive
- progressive education
- progressively