D defs.my
Entry 2 senses Webster, 1913

Arching

/är'-chĭng/ · Arch·ing · IPA /ˈɑrtʃɪŋ/
01 n. The arched part of a structure.
  1. 1.
    The arched part of a structure.
  2. 2.
    Hogging; -- opposed to sagging.(Naut.)