counterbore

US:USA pronunciation: respellingUSA pronunciation: respelling(kountər bôr′, -bōr′; kountər bôr, -bōr)



WordReference Random House Unabridged Dictionary of American English © 2020
coun•ter•bore  (kountər bôr′, -bōr′; kountər bôr, -bōr),USA pronunciation n., v.,  -bored, -bor•ing. 
n. 
  1. Buildinga tool for enlarging a drilled hole for a portion of its length, as to permit sinking a screw head.
  2. Buildingthe portion of the hole so enlarged.

v.t. 
  1. Buildingto enlarge (a drilled hole) along part of the length of the hole by drilling with a bit having a greater diameter.
coun′ter•borer, n. 
  • counter- + bore1 1605–15

Advertisements
Advertisements

Report an inappropriate ad.