中医学名词。精血或津液亏损的病理现象。因精血和津液都属阴，故称“阴虚”。《素问·调经论》：“经言阳虚则外寒，阴虚则内热。”《医宗金鉴·张仲景＜伤寒论·阳明全篇＞》“脉浮而芤”注：“脉浮而芤，浮为阳盛，芤为阴虚。”

1.{中医} deficiency of yin, with irritablity, thirst, constipation, etc. as symptoms