The shortest diameter of an ellipse, which bisects the major axis at a right angle.

(colloquial) transient ischemic attack

(colloquial) transient ischemic attack

(biology) The simplest tissue culture medium (containing the minimum of nutrients) that would support the proliferation of cells

Persicaria perfoliata; Polygonum perfoliatum; Asiatic tearthumb; kudzu of the North. / Kudzu; Pueraria lobata; Pueraria montana var. lobata / Ipomoea cairica, a species of morning glory

At the rate of one mile per minute, 60 miles per hour.

Very fast

(idiomatic) Very close to a deadline or potential crucial event.

(roller derby) The test of roller skating ability which all competitors must pass in order to play.

A type of mine where rock or minerals are extracted from the earth by their removal from an open pit or borrow.