Definify.com
Webster 1913 Edition
Whirtle
Whir′tle
,Noun.
 (Mech.) 
A perforated steel die through which wires or tubes are drawn to form them. 
Definition 2025
whirtle
whirtle
English
Noun
whirtle (plural whirtles)
- (engineering) A perforated steel die through which wires or tubes are drawn to form them.