Hypertext Webster Gateway: "abeam"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Abeam \A*beam"\, adv. [Pref. a- + beam.] (Naut.)
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.
From WordNet (r) 1.7 (wn)
abeam
adv : at right angles to the length of a ship or airplane
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