As nouns the difference between terms and protocorm
is that terms is while protocorm is (botany) a tuberous mass of cells that is the embryonic form of orchids and club mosses.
terms
English
Noun
(head)
Statistics
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protocorm
English
Noun
(
en noun)
(botany) A tuberous mass of cells that is the embryonic form of orchids and club mosses
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References
*OED (online) 2007