medusa
UK[mɪˈdjuːzə]US[məˈduːsə]
n
(in Greek mythology) a monstrous creature with snakes for hair, whose gaze could turn people to stone.
n
(biology) a free-swimming form of a coelenterate, such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles.
Etymology
The word 'Medusa' originates from the Ancient Greek Μέδουσα (Medousa), the feminine present participle of the verb μέδω (medō), meaning "to rule over" or "to protect." Thus, the name carries the literal sense of "the guardian" or "the protectress." In Greek mythology, Medusa was one of the three Gorgons, a monstrous figure whose petrifying gaze made her a formidable guardian of sacred spaces. The biological term 'medusa' was adopted in the 18th century due to the visual resemblance of the jellyfish's dangling tentacles to the snake-haired head of the mythological monster, creating a metaphorical link between the creature's defensive stings and Medusa's petrifying power.
Analysis
The word 'medusa' is a direct loan from Latin, which itself borrowed it from the Greek name Μέδουσα (Medousa). It is a proper name and not productively formed from smaller, free morphemes in English. Its function is as a noun.
Examples
The hero Perseus used a mirrored shield to avoid the direct gaze of Medusa.
The life cycle of many jellyfish includes both a polyp stage and a medusa stage.
The medusa drifted through the water, its translucent bell pulsing rhythmically.