n.
Variant: also tres · sel
Pronunciation: ' tre-s ə l also ' tr ə -
Function: noun
Etymology: Middle English trestel, from Anglo-French, from Vulgar Latin *trastellum, from Latin transtillum, diminutive of transtrum traverse beam, from translation across ― more at THROUGH
Date: 13th century
1 : a braced frame serving as a support
2 : HORSE 2B
3 : a braced framework of timbers, piles, or steelwork for carrying a road or railroad over a depression