[f. BEAM sb.1 + -ER1.] One who works with a beam; e.g., one who arranges yarn on the beam of the loom.

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1879.  Temple Bar, LV. 453. You must find some one else to overlook the beamers.

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1884.  Graham, in U. P. Mag., July, 350, Crofters, beamers, weavers, and traders came forward.

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