1) Thin ribbon noodles 2) Type of pastum 
Taglierini is a type of ribbon pasta. It is like tagliatelle but is a thinner version. It`s a traditional recipe in Piedmont where it`s called Tajarin and made of egg dough (pasta all`uovo). It`s typically served with butter and truffles (tajarin ai tartufi) or meat roast sauce (tajarin al sugo di arrosto). ...
A flat ribbon pasta, narrower than tagliatelle, measuring approximately 3mm across.
(Italian) Thin ribbon noodles.
A thinner version of tagliatelle, taglierini are a thin, ribbon pasta with a flat, rectangular cut. Made with semolina flour and water, taglierini are good with any vegetable or fish-based sauces.