from The Century Dictionary.
- noun A genus of holochoanitic nautiloid Cephalopoda having an apically swollen endosiphuncle. It occurs in the Trenton limestone.
Sorry, no etymologies found.
I'm in the room to take what the Aussies call a nanno nap.
A study of coccoliths in the nanno/foram ooze, characteristic of ocean floor deposition at depths of between 2,000 m and 4,000 m, indicates that the crust was formed during the early or middle Miocene.
By the way, I'm the type who cheats when doing crossword puzzles etc., and look up the answer if I can't figure it out in a nanno second.
"Sometimes you find a 'nanno,' or something the size of your fingernail.