nan·o·tube 
(nănə-tb′, -tyb′)
(nănə-tb′, -tyb′)n.
A hollow cylindrical or toroidal tube measuring nanometers in diameter, composed of atoms of a single element, typically carbon.
- in the name of
- in the nick of time
- in the offing
- in the public eye
- in the raw
- in the round
- in the running
- in the saddle
- in the same boat
- in the same breath
- in the short run
- in the soup
- in the street
- in the sun
- in the swim
- in the tank
- in the teeth of
- in the wake of
- in the way
- in the wind
- in the wings
- in the works
- in the world
- in the worst way
- in the zone