They have two hoofs, but as the inside edge of these is flattened, they look as if they had only one cleft down the middle, the foot underneath is provided with elastic pads, connecting the toes together, and Extruding beyond them at the sides.
"Anecdotes of the Habits and Instinct of Animals"
R. Lee
High up in the ship's side a yawning gap slid open, Extruding stairsteps, and men and Lhari began to descend.
"The Colors of Space"
Marion Zimmer Bradley
Those who pursue this train of reasoning, seem not sufficiently to inquire whither it will lead them, nor to know that it will equally shew the propriety of suppressing all wholesale trade, of shutting up the shops of every man who sells what he does not make, and of Extruding all whose agency and profit intervene between the manufacturer and the consumer.
"A Journey to the Western Isles of Scotland"
Samuel Johnson