| Term | Definition |
| CORD | A thickened round-topped transverse (i.e., spiral) or axial sculptural element. | |
| CORDATE | Shaped like a heart; often applied to shells such as Cardium, Cardita, and Venus; see also: CORDIFORM; SEMICORDATE. | |
| CORDED | Sculptured with cords. | |
| CORDIFORM | Heart shaped, as in the bivalve Corculum cardissa. See also: CORDATE. | |
| MARGIN, DISCORDANT | With margins of closed valves not in exact juxtaposition, but one overlapping the other; example: Anadara; see also: INEQUIVALVE. | |
| RADIAL CORD | [need definition]. See illustration: Composite Bivalve. | |
| SEMICORDATE | Half heart-shaped; see also: CORDATE; CORDIFORM. | |
| SPIRAL CORD | [need definition]. See illustration: Composite Gastropod. | |
| WRS WORLD RECORD SIZE |
The abbreviation (acronym) for World Record Size. Such records for maximum size are maintained in the "Registry of World Record Size Shells", by Kim Hutsell, Linda Hutsell and Don Pisor; it is available from San Diego Shell Club in California, USA; Snail's Pace Productions. Earlier versions of a WRS catalog were published by Wagner and Abbott, published by American Malacologists. See also: MICRO; MINI; MINIATURE and the website: WRS Shells. See also: GERONTIC | |
 
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