1) Carinate 2) Carinated 3) Ridged 4) Tipped over 5) Upset 1) Carinate 2) Carinated 3) Ridged 
having a ridelike structure
• (a.) Having a median ridge; carinate; as, a keeled scale. • (imp. & p. p.) of Keel • (a.) Keel-shaped; having a longitudinal prominence on the back; as, a keeled leaf.
A sharp edge often found on the corner of cabriole legs, the term 'keeled' is used because it resembles the keel of a boat.
Refers to a scale that has a ridge running down the middle. Opposite of a keeled scale is a smooth scale.
<botany> Of leaves or bracts, folded and ridged along the midrib. ... (19 Jan 1998) ... 
Keeled adjective 1. (Botany) Keel-shaped; having a longitudinal prominence on the back; as, a keeled leaf. 2. (Zoology) Having a median ridge; carinate; as, a keeled scale. 
Ridged like the bottom of a boat; also the two front united petals of a papilionaceous flower.
Refers to a scale with a raised ridge running down its midline.
having a ridelike structure