nidor (and nidorous, nidorose) was taken direct from L. by those inkhorn guys; here's Bacon (when he wasn't ghosting for WS): "Incense, and Nidorous Smells, (such as were of Sacrifices,) were thought to Intoxicate the Braine."

but what of all those nesting words? these all stem from L. nidus
nidificate - to make a nest
nidifugous - Of a bird: bearing young which are well developed at birth and leave the nest almost immediately
nidify - to build a nest
nidulant - nestling, embedded
nidulation - nesting, nidification
nidus - A nest or place in which small animals, such as insects, snails, etc., lodge or deposit their eggs. ( fig. A source or origin; a place where some quality or principle is fostered)
nidiot (or nidget) - an idiot [whoa... how'd that get in there]


(btw, I knew nidor from using it as a wwftd lo these many moons ago.)