0 the long supporting piece of a ship’s frame that lies lengthwise along the bottom -- lunas
A lateral longitudinal keel-like ridge occurs on abdominal segments 1-8 just ventral to the spiracles, becoming extremely prominent as the respiratory contractions of the larva take place.
They chirped and keeled over.
It's the need to learn and blend with the environment, to keep an even psychological keel, to have an eye for detail and another on the big picture.
Most of the ammonites studied have ribs, tubercles, keels and other ornaments.
The lower field has transverse plications that become thickened along the keel.
A steel keel provides an added moment to maintain the vehicle in an upright pose.
Only then could parish politics be put back on an even keel.
That said, might the effect of our folly in this last regard be righted by the keel of evolutionary fortune?
