Digital Dictionary of Buddhism
胎獄
[zh] tāiyù
[ko] 태옥
[ko] taeok
[ja] タイゴク
[ja] taigoku
Basic Meaning: hell of the womb
DDB explanation (non-members log in as "guest")
Dictionary of Buddhist Studies
胎獄
【譬喻】四生中之胎生者,在母胎內之苦,譬如獄也。又云胎宮。天台觀經疏序曰:「金寶之與泥沙,胎獄之與華池。」
A Dictionary of Chinese Buddhist Terms -- by William Edward Soothill and Lewis Hodous
胎獄
胎宮 The womb prison, the womb regarded as a prison; see胎生.