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pro·to·corm | \ ˈprōtə+ˌ- \
Definition of protocorm
1 : a tuber-shaped body with rhizoids that is produced by the young seedlings of various orchids and some other plants having associated mycorrhizal fungi
2
[prot- + -corm (from New Latin cormus)] : the part of an insect embryo posterior to the protocephalon
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