One of the most widely accepted theories is that the name comes from the Irish word , defined by Dinneen as a pigmy, a sprite, a leprechaun; for ; the latter word Dinneen defines as a pigmy, a leprechaun; 'a kind of aqueous sprite';ref dinneen this word has also been identified as meaning half-bodied, or small-bodied.
Exfiltration is the gradual leakage of fluid through any industrial equipment, a membrane or a wall because of small opening. Exfiltration occurs when a small opening allows fluid to drain from within an assembly. The gradual deposition of leaking fluid can cause corrosion in metal structures such as boilers, heat exchangers, storage tanks and other types of equipment and machinery. Exfiltration is also known as weep.
Excretion is defined as the process of expelling waste matter, or the waste matter expelled by this process. 1  When a person goes to the bathroom to urinate, this is an example of excretion.  Urine is an example ofexcretion.