psiKK [saɪ] /saɪ/發音名詞1磅每平方英寸、磅力/平方英寸縮寫,壓力單位The front tires should be inflated to about thirty-two psi.前輪胎壓應該打到大約三十二磅每平方英寸。2希臘字母Ψ、普西The symbol for the wave function is the Greek letter psi.波函數的符號是希臘字母Ψ。3超感官能力、靈異現象專業用語Researchers have long argued over whether psi can be measured at all.研究者長久以來爭論超感官能力究竟能否被測量。