Āpo-dhātu

āpo-dhātu: 'water-element'; s. dhātu.

Water (or liquid) element (āpo-dhātu): Internal water elements include

   bile,
   phlegm,
   pus,
   blood,
   sweat,
   fat,
   tears,
   nasal mucus,
   urine, etc.

Also see: Mahābhūta;