[meaning]

South Africa (flag).

(See CCS or CS)

an antiwear additive found in many types of hydraulic and lubricating fluids. Zinc dialkyldithiophosphate.

A small freshwater mollusk that was accidentally introduced to North American waters via ballast water from a transoceanic vessel. The zebra mussel has had significant negative economic and ecological effects: It clogs water intake pipes and attaches to a ...

The point of the celestial sphere which is directly overhead.

The angle between the zenith and a heavenly body.

Any soft, gentle breeze.

A gentle breeze; the slightest movement of air.

ZERNOCON. Old code name for charter parties relating to grain cargoes from Russian, Black sea and Azoff ports to UK. (Kerchove)

The temperature of pure melting ice under standard atmospheric pressure on the Centigrage and R

A discharge limit applied to manufacturing and commercial establishments in which only normal human sanitary wastewaters may be discharged to the municipal sewerage system. All other types of wastewater, such as that water used in manufacturing processes, ...

See electrokinetic potential.

Sacrificial anodes placed on a vessel to prevent electrolysis of vital metal parts.

An area within the interior space of a building, such as an individual room(s), to be cooled, heated, or ventilated. A zone has its own thermostat to control the flow of conditioned air into the space.

The combining of rooms in a structure according to similar heating and cooling patterns. Zoning requires using more than one thermostat to control heating, cooling, and ventilation equipment.

Used to indicated times measured in Coordinated Universal Time, a successor to Greenwich Mean Time. A time standard that is not affected by time zones or seasons.

(See Z and GMT)

Time based on Greenwich Mean Time.

ZUMACA. Small sailing coaster from the River Plate estuary and the adjacent waters of Brazil. (Kerchove)