Word Study
abeam
CIDE DICTIONARY
abeam, adv. [Pref. a- + beam.].
On the beam, that is, on a line which forms a right angle with the ship's keel; opposite to the center of the ship's side. [1913 Webster]
OXFORD DICTIONARY
abeam, adv.
1 on a line at right angles to a ship's or an aircraft's length.
2 (foll. by of) opposite the middle of (a ship etc.).
1 on a line at right angles to a ship's or an aircraft's length.
2 (foll. by of) opposite the middle of (a ship etc.).
Etymology
A(2) + BEAM
For further exploring for "abeam" in Webster Dictionary Online
