(inorganic chemistry) A polyphosphate salt or ester containing three phosphorus atoms and ten oxygen atoms in each unit of the formula P₃O₁₀⁵⁻

Initialism of Hells Angels Motorcycle Club.

Auxiliary or supplemental. / Secondary or subordinate. / Of or relating to a subsidy.

A coastal town in Angus council area, Scotland (OS grid ref NO5634).