The singular form of the medical term ‘spermatozoa’ is ‘spermatozoon’.
In medical terminology, certain words have specific plural endings based on their origins. ‘Spermatozoa’ is derived from Greek, where ‘zoon’ means animal, and ‘sperma’ refers to seed or sperm. Therefore, when referring to a single unit, it is appropriate to use ‘spermatozoon’. This term is commonly used in biology and medicine when discussing male reproductive cells.