Definition of "roundworms" [roundworms]

• Plural form of roundworm. (noun)

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• "If incremental, additive genetic changes were responsible for all the boggling biodiversity we see around us, he said, how can it be that humans have hardly more genes than a microscopic nematode, and that many of those genes are nearly identical in roundworms and humans besides?"
• "But they're hard to see in summer because their tiny bodies are a deep blue-black, and they spend most of their lives burrowing around in leaf litter looking for algae and even smaller animals called roundworms and rotifers."
• "Ascarids, also known as roundworms, pose a considerable threat to young horses and their developing immune systems, and they have to potential to kill by triggering colic."