preadaptation
noun
pre·ad·ap·ta·tion
ˌprē-ˌa-ˌdap-ˈtā-shən 
: a character or the condition of possessing a character that takes on a function when none previously existed or that differs from its original function : exaptation
This principle of evolution is sometimes called preadaptation. There's no foresight involved, though—simply the lucky coincidence that a feature that evolved to do one thing may turn out later to do another thing even better.—
Carl Zimmer
Carl ZimmerNote: While the newer term exaptation has been widely adopted, preadaptation continues to be acceptable in current usage with both terms showing comparable frequency of usage.
preadapted
adjective
One hypothesis is that hot-blooded dinosaurs were clothed with feathers for insulation and were therefore preadapted for flight.
—Alan Feduccia
Alan Feduccia
Cite this Entry
“Preadaptation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/preadaptation. Accessed 29 Oct. 2025.
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