石せき炭たん袋ぶくろMeaningsNoun1. Coalsack Nebula2. coal sack; coal bagKanji used石stone炭charcoal袋sackPitch accentせきたんぶくろComposed of石せき炭たんcoalNoun袋ふくろbag; sack; pouch; skin of an orange (and other like fruits); dead end; plot of land surrounded by waterNoun