antibacterial cementanticlastic curvatureanticlineanticycloneantiduneantifoaming agentantifreezeantifreeze solutionantifrictionantifrostantiskid treatmentantisymmetricapertureapogean tideapparent circular motionapparent cohesionapparent densityapparent porosityapparent specific gravityapparent velocityapparent velocity of groundwaterapplication of loadapplied hydrologyapplied pressureapplied stressapplied transportationapproachapproach areaapproach noseapproach rampapproach speedapproach widthapproach zoneapprovalapproximateapproximate assumptionapproximate methodapproximationapronapron elevationaquatic plantaquatic weedaqueductaqueous wateraquicludeaquiferaquifugearcarc blowarc brick