WordNet: ydin

(astronomy) the center of the head of a comet; consists of small solid particles of ice and frozen gas that vaporizes on approaching the sun to form the coma and tail

• domain: topic astronomia, tähtitiede

• hypernym keskipiste, puoliväli

• part holonym komeetta, pyrstötähti

ydin

• (englanti) nucleus (synonyymi)