| 释义 |
knife-edge
\ˈ ̷ ̷ˌ ̷ ̷\ noun
: a sharp narrow edge or margin like that of a knife: as
a. : a sharp wedge of steel or other hard material used as a fulcrum or axis of motion for a lever arm or beam in a machine or instrument of precision (as a scale, testing machine, pendulum) to minimize friction
b. : a narrow ridge (as of rock, ice, or sand)
c. : girdle d |