In aerodynamics, angle of attack specifies the angle between the chord line of a foil and the vector representing the relative motion between the foil and the atmosphere.

The angle formed by the centerline of the vessel and the tangent to the design waterline at the forward perpendicular.

Downflooding angle related to intact stability is the angle of heel at which the lower edge of openings in the hull, superstructures or deckhouses that cannot be closed weathertight immerse.

A steady angle of heel created by an external force, such as wind or waves.

A steady angle of heel created by forces within the ship. For example, when the ship is inclined due to her asymmetric construction, or by shifting a weight transversely within the ship. The list reduces of ship’s stability.

The angle at which a ship with a negative initial metacentric height will lie at rest in still water. In a seaway, such a ship will oscillate between the angle of loll on SB and the one on PS.

The angle between the horizontal line and the side of the cone formed when the granular materials as grain, coal, sand or ores are poured onto a flat surface. The angle of repose of most grain loads...

Anisotropic energy is energy that is directionally specific.

The type of steel heat treatment. The steel is heated to around 850-950°C and then is cooled slowly either in a furnace or in an insulated space. Softer, more ductile steel that that in the normalised condition is produced.

Annual Efficiency Ratio: “AER”, a carbon intensity metric calculated in accordance with Poseidon Principles.

Defined to be the difference between the annual amount of heat rejected to the ground heat exchanger in the cooling mode and the annual amount of heat extracted from the ground heat exchanger in the heating mode.

Annualized geo-solar enables passive solar heating in even cold, foggy north temperate areas.

An audible signal indicating a condition or system state (usually of an emergency or abnormal nature).

An anode is an electrode through which the conventional current enters into a polarized electrical device.

Anthracite, also known as hard coal, is a hard, compact variety of coal that has a submetallic luster.

The Anthropocene is a proposed geological epoch dating from the commencement of significant human impact on Earth's geology and ecosystems, including, but not limited to, anthropogenic climate change.

Anti-environmentalism is a movement that favors loose environmental regulation in favor of economic benefits and opposes strict environmental regulation aimed at preserving nature and the planet.

The anti-nuclear movement is a social movement that opposes various nuclear technologies.

Anti-exposure suits are similar to immersion suits, but there are a few differences. They must provide at least 70 Newtons of buoyancy and be made of material that reduces the risk of heat stress during rescue and evacuation operations.

A paint containing agents for preventing the adhesion and growth of organisms on the hull.