Words related to side
first letter of the Roman alphabet, based on Greek alpha (see alpha). In music from c. 1600 as the name of the sixth note of the natural scale; it is the note given by a fixed-tone instrument (usually oboe or organ) to which all the instruments of an orchestra are tuned. As a blood type, 1926, denoting A agglutinogens. The A side of a two-sided record (by 1962, see side (n.)) held the material chosen for promotion. A-bomb, short for atom bomb, was in newspaper headlines by Aug. 8, 1945.
Of things other than ships, 1630s. But oldest-recorded sense in English is "sheet of paper printed only on one side" (1570s). As an adverb by 1870; as an adjective by 1932. As a verb from 1930, "to skid sideways" (intransitive); transitive sense "to strike broadside, collide with the side of" is by 1970.