Usage History of 'allantoid'

The following chart shows how frequently 'allantoid' appeared in printed materials over time. For example, the word 'allantoid' occurred 2 times in books in 1776 and 63 times in 2008. From 1776 to 2008, the word 'allantoid' was used a total of 5,304 times in books scanned by Google. See Reference: Google Ngram project.

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