The furrowed flies are characterized by a Foreshortening of the head, which causes the surface of the eye to be thrown into irregular folds with furrows between.
"Sex-linked Inheritance in Drosophila"
Thomas Hunt Morgan Calvin B. Bridges
The stage at the ambitious New Opera House was so small, and the Foreshortening so excessive in consequence, that in the opening scene of Ivanhoe Cedric and his guests actually sat at meat in Rotherwood Hall with their knees above the table, producing a ludicrous effect.
"The Operatic Problem"
William Johnson Galloway
Towards the edge this arrangement is generally rather apparent than real, and is merely a result of Foreshortening.
"The Story of the Heavens"
Robert Stawell Ball