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leptocardia
l e p t o c a r d i a hex:#108;#101;#112;#116;#111;#99;#97;#114;#100;#105;#97;
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- Leptocardia - n. pl. - The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus.
- Leptocardian - a. - Of or pertaining to the Leptocardia.
- Leptocardian - n. - One of the Leptocardia.