Noun:

1. either of two muscles of the abdomen and pelvis that flex the trunk and rotate the thigh

PSW=Pacific Southwest 西南太平洋PSabbr.附言(=postscript)abbr.著名图象处理软件（=photoshop)psychiatric medicine[医] 精神病学psyllostearylic acid[化] 叶虱酸; 三十三酸; 三十三烷酸Psyllium preparation欧车前制剂psedoconvex function伪凸函数Pscychosocial factor心理社会因素psyehological health心理健康psychiatric referral精神病转诊psophometric network噪声计网络psk telephony signal移相键控电话信号psychrophilic enzyme适冷酶

1. The left kidney and psoas shadows may be indistinct.
   左肾和腰肌阴影可模糊不清。
2. The schwannoma is over the para-spine, near psoas muscle and causes muscle atrophy.
   神经鞘瘤位于脊髓附近且靠近腰肌，并造成肌肉萎缩。