1. A fertilized human egg, up to 14 days old, that can develop into an embryo; especially one to be implanted by IVF

Derived forms: pre-embryos

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• tinhorn
• tininess
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• tinker's dam
• tinker's damn
• tinker's root
• tinkerer
• tinkle
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• tinkling
• tinkly
• tinned
• tinned goods
• tinned meat
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• tinnevelly senna
• tinning
• tinnitus
• tinny
• tinplate
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• tinsel
• tinseled