Possible misspelling? More dictionaries have definitions for
snide,
snidely
-- could that be what you meant?
supposed natural increase during eighteen years
Some reckoned from the supposed natural increase during eighteen years, but the figure given at that date was itself an assumption. — from The Great Boer War by Arthur Conan Doyle
This tab, called Hiding in Plain Sight,
shows you passages from notable books where your word is accidentally (or perhaps deliberately?)
spelled out by the first letters of consecutive words.
Why would you care to know such a thing? It's not entirely clear to us, either, but
it's fun to explore! What's the longest hidden word you can find? Where is your name hiding?