(a.) Any heavy substance, as stone, iron, etc., put into the hold to sink a vessel in the water to such a depth as to prevent capsizing.
(a.) Any heavy matter put into the car of a balloon to give it steadiness.
(a.) Gravel, broken stone, etc., laid in the bed of a railroad to make it firm and solid.
(a.) The larger solids, as broken stone or gravel, used in making concrete.
(a.) Fig.: That which gives, or helps to maintain, uprightness, steadiness, and security.
(v. t.) To steady, as a vessel, by putting heavy substances in the hold.
(v. t.) To fill in, as the bed of a railroad, with gravel, stone, etc., in order to make it firm and solid.
(v. t.) To keep steady; to steady, morally.
Example Sentences:
(1) But does this imply that distomers must always be considered as detrimental ballast?
(2) For miles, only the strip of land for the track is dug up, but in places the footprint is much wider: access routes for work vehicles; holding areas for excavated earth; new electricity substations; mounds of ballast prepared for the day when quarries cannot keep pace with the demands of the construction; extra lines for the trains that will lay the track.
(3) That's likely to mean a tweak in set-up – most likely Vidal will play in more of an advanced role, with Silva adding extra ballast in behind him.
(4) They decreased the filtrate turbidity, concentration of the organic ballast, etc.
(5) The general supremacy of classical theory of balanced nutrition entailed the tendency to remove ballast substances from food products.
(6) Two years ago, on a dizzy night in Stratford where it seemed that everyone had forgotten to bring ballast, Greg Rutherford became the Olympic long jump champion .
(7) Fifteen refractive astigmats were fitted with prism ballasted and truncated plano, spherical lenses and prescription toric soft lenses.
(8) Although Mr Binnie did not take passengers, he took ballast to reproduce the weight of two passengers.
(9) There are other substances with properties that might justify their use, such as ballast preparations, some antidepressive agents, and a few compounds acting principally on the gastrointestinal tract.
(10) Reduction of fat and food without ballast reduced the excretion of oxalic acid in urine.
(11) Potentialities of electrochemical procedures were considered in simulation of liver monooxygenases functions directed to clearance of blood and tissues from toxic and ballast substances by means of hydroxylating oxidation.
(12) For instance, shoring up railways to prevent the ballast under the tracks from being swept away is a mammoth job, costing millions.
(13) As a result of a change in attitude of the regulatory authorities, however, for new drugs the choice in future between the racemic therapeutic or the single isomeric ballast-free drug will largely be based on a critical evaluation of the chiral characteristics with regard to their therapeutic, toxicological and pharmacokinetic aspects.
(14) The method to isolate protease preparations is developed with optimization of production cycles of the stabilization, vacuum-concentration, ballast protein salting-out and lyophilization stages.
(15) One of the techniques commonly used in stabilizing the rotation of a contact lens is prism ballasting.
(16) Mr Cameron may have been seeking intellectual ballast and coolness-by-association; the Oxford First ended up looking out of his depth.
(17) The summary preparation stellin along with a low antiheparin activity possessed a high toxicity explained by the content of ballast proteins of the nonprotamin nature.
(18) Therefore, from microecological-physiological aspects it is suggested to expand the term ballast matter by so-called "optional" or "potential" ballast matter (in the small intestine usually digestible but incompletely degraded nutriments) in addition to "obligatory" ballast matter (nutriments not digestible by indigene enzymes).
(19) Ultimately, the use of a Fluoroperm prism-ballasted fitting set resulted in 16 of 17 eyes (94%) seeing well with a front toric lens.
(20) The virus thus purfied retained completely its haemagglutinating activity and infectivity, and by one purification cycle at least 99% of ballast proteins were removed.
Centreboard
Definition:
(n.) A movable or sliding keel formed of a broad board or slab of wood or metal which may be raised into a water-tight case amidships, when in shallow water, or may be lowered to increase the area of lateral resistance and prevent leeway when the vessel is beating to windward. It is used in vessels of all sizes along the coast of the United States