Artificial intelligent assistant

lightmanship

I. ˈlightman Obs.
    [? f. light a.1 + man, as in Indiaman, etc.]
    ? An unladen ship. (But cf. lighterman.)

1665 Lond. Gaz. No. 16/1 On Friday last, 20 sail of Lightmen weighed Anchor.

II. lightman, lightmanship
    see light n. 16.

Oxford English Dictionary

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