: a genus (the type of the family Williamsoniaceae) of fossil cycads having slender more or less branched stems and conspicuous bracts or scales associated with the fructification and occurring in rocks from the Upper Triassic to Middle Cretaceous in both the New and Old Worlds

Word History


New Latin, from William C. Williamson †1895 English naturalist + New Latin -ia

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Dictionary Entries Near Williamsonia

Cite this Entry

“Williamsonia.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Williamsonia. Accessed 23 Jun. 2024.

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