plural of mainspan

the principal shaft of a motor / (archery) The primary shaft of an arrow into which the foreshaft containing the arrowhead is inserted.

plural of mainshaft

Able to be brought into the mainstream.

plural of mainspar

(aeronautics) The main spar of an aircraft

General public awareness of ideas and topics.

A hamlet and civil parish (served by Mainstone with Colebatch Parish Council) in south-west Shropshire, England (OS grid ref SO2787).

A public policy concept to achieve gender equality.

A chief support. / Someone or something that can be depended on to make a regular contribution. / (nautical) A stabilising rope from the top of the mainmast to the bottom of the foremast.