Possible misspelling? More dictionaries have definitions for
lepto,
lepton
-- could that be what you meant?
language entirely prevented the old manual
It neither produced uniformity in the methods of teaching, nor, even for instruction in a dead language, entirely prevented the old manual from becoming diverse in its different editions. — from The Grammar of English Grammars by Goold Brown
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?