LSJ
Att. νεοττίον (later νοσσίον Lyr. in Philol. 80.336), τό, Dim. of νεοσσός, nestling, chick, Arist. HA 536a30; metaph, τοῦ πατρὸς ν. ΄chip of the old block΄, Ar. Av. 767, cf. Thphr. Char. 2.6.
yolk of an egg, Men. 42 (prob.), Diph. 121, Hsch.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)