Lexical Definition

‎ἀρτέμων‎ artémōn (ar-tem'-ohn) foresail ^G:N-M
from a derivative of ‎ἄρτι‎

mainsail.

• properly, something ready (or else more remotely from ‎αἴρω‎ (compare ‎ἄρτος‎)
• something hung up), i.e. (specially) the topsail (rather foresail or jib) of a vessel

Abbott-Smith

*† ἀρτέμων, -ωνος (Rec. -ονος), ὁ (< ἀρτάω, to fasten to),
a fore-sail or top-sail: Ac 27:40 (v. DB, ext., 366b, 399a; MM, s.v.).†

Abbott-Smith References

Liddell-Scott-Jones

ἀρτέμων-ων, ονος, ὁ,

(ἀρτάω) foresail of a ship, [NT+6th c.AD+]

__II principal pulley in a system, [Refs 1st c.BC+]

_{LSJ Scripture Refs: Acts.27.40}