The lower keel-shaped part of the same formed the car.    From Wordnik.com.  [British Airships, Past, Present, and Future] Reference

Their skulls are without angles and differ greatly from the keel-shaped skulls.    From Wordnik.com.  [Scientific American Supplement, No. 1157, March 5, 1898] Reference

Our view of the dome was marred somewhat by an enormous keel-shaped scaffold used by workers restoring the dome.    From Wordnik.com.  [Holy Wisdom] Reference

This envelope was attached to a rigid elliptical keel-shaped girder made of steel tubes, which was about a third of the length of the ship.    From Wordnik.com.  [British Airships, Past, Present, and Future] Reference

A keel-shaped mound was made of wet sand, about fifteen feet long by two feet high.    From Wordnik.com.  [The Belief in Immortality and the Worship of the Dead, Volume I (of 3) The Belief Among the Aborigines of Australia, the Torres Straits Islands, New Guinea and Melanesia] Reference

This being the case, it just turns over and swims with its keel-shaped back in the water.    From Wordnik.com.  [The Insect Folk] Reference

Underneath, on the median line, we see a long, dark-brown scale, pointed, keel-shaped, fixed by its base to the first abdominal segment, with its sides prolonged into membranous wings which are fastened tightly to the insect's flanks.    From Wordnik.com.  [The Mason-Bees] Reference