ballast


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ballast

(bal'ăst),
1. Material of doubtful value itself used to stabilize something (for example, maritime practice). 2. Something largely without intrinsic value.

ballast 

Additional weight of material incorporated in a part of a contact lens to maintain it in a given orientation (Fig. B1). This is often provided by giving prismatic power to the lens (prism ballast lens).
Fig. B1 Truncated and prism-ballasted toric contact lensenlarge picture
Fig. B1 Truncated and prism-ballasted toric contact lens
References in periodicals archive ?
Renaissance Construction supports Ballast Nedam's business strategy and necessary improvement plans;
For example, the Asian clam appeared there in 1986, almost certainly transported in the ballast tanks of a freighter, says Peter B.
The Nonindigenous Aquatic Nuisance Prevention and Control Act of 1990 mandates ballast exchange only for ships entering the Great Lakes.
International Rectifier, IR([R]) (NYSE:IRF), a world leader in power management technology, today introduced the IRS2168D fully-integrated and protected high-voltage integrated circuit (HVIC) for advanced electronic linear fluorescent lamp ballasts which incorporate active power factor correction (PFC).
The recently announced sale of Ballast Nedam Offshore's activities to Van Oord is now complete.
Gaining IMO Final Approval status has involved an extremely stringent review and investigation process, and we are naturally very delighted that the Wartsila AQUARIUSA EC Ballast Water Management System has successfully met all the requirements of the process.
The report Global Ballast Water Treatment Systems Market 2015-2019, has been prepared based on an in-depth market analysis with inputs from industry experts.
The transaction, which represents a substantial book profit for Ballast Nedam, is expected to be finalized shortly.
We believe CBTF[TM] is the best all-around movable ballast system on the water and gives racers an advantage on long courses, short courses, buoy racing and offshore - both upwind and downwind.
For this reason and in accordance with the contract, Ballast Nedam has decided to formally submit a request for ICC-arbitration.
The Offeror and Ballast Nedam today jointly announce that at the expiration time of the Post-Closing Acceptance Period (as defined below) on 30 November 2015, 80.
July 28, 2015 /PRNewswire/ -- If you are considering a retrofit of your fluorescent fixtures with ballast compatible LED T8 tubes, getting the utility rebate should be a no-brainer, right?