dial. Also sweeler; see also SWALER, [f. SWEAL v. + -ER1.] (See quot. 1877.)

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1877.  N. W. Linc. Gloss, Swealer, a speck of foreign matter in the grease of a candle which causes it to sweal.

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1896.  N. Munro, Lost Pibroch, etc., 121. Had it been shrouds instead of sweelers.

3