#azoo

• Azoo — Completely devoid of animal organisms or traces of faunal existence; a term utilized as an independent adjective or combining form (a variant of azoic) to describe sterile ecological environments, archaic geological strata, or laboratory cultures where no animal life forms have developed.
• Azoospermia — A medical condition characterized by the complete absence of spermatozoa in the ejaculated semen, representing a major cause of male infertility; it can be obstructive (blocked ducts) or non-obstructive (production deficiencies within the testes).