Crossword clues for the word: YOLKSAC The word YOLKSAC has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for YOLKSAC Showing 1 to 5 of 5 results Clue(s) Egg membrane Embryonic attachment Mum's food parcel - 50 kilograms - in a cosy bundle Part of an egg Source of nutrition you nearly left by overturned barrel