バイ LinksSentence search for バイSentence search for 貝Sentence search for ばいEdit in JMdict Noun1. Japanese Babylon (Babylonia japonica); Japanese ivory shellUsually written using kana aloneNoun2. spinning top (traditionally made from a Japanese Babylon shell)Abbreviation, See also 貝独楽Other forms貝 【ばい】 Discussions Log in to talk about this word.