A18 or A-18 is a
three-character acronym that may refer to:
*
A18 road (disambiguation), in several countries
*
A-18 Shrike, a Curtiss Model 76A twin radial engine monoplane service test aircraft of the mid-1930s
*
Aero A.18
The Aero A.18 was a biplane fighter aircraft built in Czechoslovakia in the 1920s. It was a development of the Ae 02 and Ae 04 fighters Aero had designed during World War I, but also borrowed from the more recent A.11 reconnaissance-bomber d ...
, a Czech fighter aircraft built in the 1920s
*
Arrows A18, a Formula One car
*
British NVC community A18 (Ranunculus fluitans community), a plant community
*
''Cunninghamella'' A18, a fungus strain
* A18, one of the Encyclopaedia of Chess Openings codes for the
English Opening
The English Opening is a chess opening that begins with the move:
:1. c4
A flank opening, it is the fourth most popular and, according to various databases, one of the four most successful of White's twenty possible first moves. White begins t ...
in chess
* Subfamily A18, a
rhodopsin-like receptors subfamily
*
F/A-18 Hornet, an all-weather carrier-based strike fighter designed to fill the roles of fighter aircraft and attack aircraft
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