The term 'Egg of Old Rome' refers to two words: OVA and OVUM. OVA is a three-letter word meaning 'eggs' and OVUM is a four-letter word meaning 'a single egg cell'. This term is derived from the Latin language and is used to refer to the egg that was laid by the mythical bird, the Phoenix, which was said to have been born from the ashes of its predecessor. This egg was believed to have been laid in the city of Rome and was seen as a symbol of rebirth and renewal.