release cock en · NOUN
Meanings
-
A valve; one application was for opening train doors in an emergency.
Release cocks are fitted adjacent to each door both on the inside and outside of the car for use in an emergency, or for entry of depot staff.
1958 April 14, “Diesel Railbus for British Railways”, in Railway Magazine, page 277:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| release cocks | Number=Plur | lexicographic |