From WordNet (r) 3.0 (2006) [wn]:
spaghetti
n 1: spaghetti served with a tomato sauce
2: pasta in the form of long strings
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Spaghetti \Spa*ghet"ti\, n. [It.]
A variety or macaroni made in tubes of small diameter.
[1913 Webster] Spagyric