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WordNet-Online 
 Definitions from WordNet
Noun heterostraci has 1 sense 
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| Definitions from the WebHeterostraciNoun: Heterostraci is a subclass of extinct armored jawless fishes that lived during the Paleozoic era. Example sentence: The fossils of heterostraci provide invaluable insights into the early evolution of vertebrates. Related products: Fish Fossils, Paleozoic Fossils | ||||
| heterosexual person heterosexualism heterosexuality heterosis heterosomata heterosporous heterospory heterostracan heterostraci heterotaxy heterotheca heterotheca villosa heterothermic heterotrichales heterotroph heterotrophic heterozygosity 
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