Wordnet polsko-angielski 
                         (a small round body of protein in a cell nucleus
such organelles contain RNA and are involved in protein synthesis) 
nucleolus, nucleole 
Słownik polsko-angielski mLingua © Internetowe Centrum Tłumaczeń mLingua
                        nucleolus
Słownik medyczny polsko-angielski Iwona Kienzler
                        nucleolus n