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1. Greek & Roman Mythology The faithful companion of Aeneas in Virgil's Aeneid.
2. A loyal friend.


1. (Classical Myth & Legend) classical myth Aeneas' faithful companion in Virgil's Aeneid
2. a loyal friend


(əˈkeɪ tiz)

1. (in the Aeneid) the faithful companion of Aeneas.
2. a faithful friend or companion.
References in classic literature ?
The fact was, that Tom's heart had already smitten him for not asking his fidus Achates to the feast, although only an extempore affair; and though prudence and the desire to get Martin and Arthur together alone at first had overcome his scruples, he was now heartily glad to open the door, broach another bottle of beer, and hand over the old ham-knuckle to the searching of his old friend's pocket-knife.
On resuming, however, he was not only calm, but cold; and this flying for safety to the other extreme is the single instance of self-distrust which the present Achates can record to the credit of his impious AEneas.
Achates Power recently unveiled a demonstration pickup truck featuring an opposed-piston gasoline compression ignition engine at the 2018 North American International Auto Show.
At the event, a Ford F-150 displayed at the Aramco booth showed a collaboration with Achates Power on an opposed-piston GCI engine concept - reinforcing the viability of the technology and its efficiency at an estimated 37 miles per gallon.
Achates Power Inc, an engine manufacturer, has signed a joint development agreement with Saudi Aramco's US-based subsidiary, Aramco Services Company.
Engine manufacturer Achates Power Inc reported on Friday the launch of a joint development agreement for a series of Opposed-Piston (OP) Engine projects with Saudi Aramco's US-based subsidiary Aramco Services Company (ASC).
Nasser added that "the implemented investments to benefit from the innovations of Solidia Technologies and Achates Power companies, and the development and construction of the first commercial gas-generating power plant which is capable of capturing, storing and using carbon, are considered the best demonstration of the determination and persistence of OGCI to address the dilemma of global warming through innovative solutions.
The investments with Solidia Technologies, Achates Power and the first commercial carbon capture, use and storage (CCUS) gas plant are a testimony to OGCI's determination in tackling climate change through technology-enabled solutions that align with Saudi Aramco's key priorities of reducing GHG emissions in the energy sector.
21) "If he could but play backgammon," Sewall said, "I declare I would chuse him, in preference to all the men in the world, my fidus Achates, in my projected asylum.
Magazine, a Michigan business publication, has recognised San Diego-based Achates Power Incorporated as Michigan Economic Bright Spot for 2017.