| 释义 |
nounPlural medusas, Plural medusaemɪˈdjuːzəmɪˈdjuːsə Zoology 1A free-swimming sexual form of a coelenterate such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles around the edge. In some species, medusae are a phase in the life cycle which alternates with a polypoid phase. 〔动〕水母体；水母期。比较POLYP Compare with polyp Example sentencesExamples - Scyphozoan polyps and medusae exhibit no cephalization and contain no brain, but in some species, light-sensitive eyespots are located along the bell margin of the medusa.
- A medusa, or jellyfish, is part of the life cycle of just one major group of animals, the cnidarians.
- In polyps, medusae, and worms, all longitudinal and circumferential muscles attach to the thin body wall over a wide area.
- Two major adult body types characterize the phylum: the medusa is typically a mobile pelagic organism, and the polyp is typically a sessile benthic organism.
- Cnidarians have two basic body forms, medusa and polyp.
- 1.1 A jellyfish.
水母，海蜇 Example sentencesExamples - Predation by an abundance of medusae on zooplankton and ichthyoplankton could affect the North Sea ecosystem through top-down and bottom-up mechanisms.
- This specialized tank creates a waterflow that keeps medusae and other delicate animals in constant suspension assuring that their tissues are not destroyed by abrasive contact with aquarium walls.
- In studies with a microscope, Forbes had shown that hydroid jellyfish known as naked-eyed medusae reproduce not only by spewing eggs, but also by asexual budding, which he found marvelous to behold.
- Remaining undigested by the medusa, the small snail will devour its host from within, growing larger as its host is correspondingly diminished in size.
- Noteably, all epipelagic, midwater, and deepsea medusae have very simple, reduced, or absent ocelli.
OriginMid 18th century: named by association with Medusa. Rhymesabuser, accuser, boozer, bruiser, chooser, cruiser, diffuser, infuser, lollapalooza, loser, Marcuse, mezuzah, misuser, peruser, refuser, snoozer, Sousa, user, yakuza proper nounmɪˈdjuːzəmɪˈdjuːsə Greek Mythology The only mortal gorgon, whom Perseus killed by cutting off her head.
noun Zoology 1A free-swimming sexual form of a coelenterate such as a jellyfish, typically having an umbrella-shaped body with stinging tentacles around the edge. In some species, medusae are a phase in the life cycle which alternates with a polypoid phase. 〔动〕水母体；水母期。比较POLYP Compare with polyp Example sentencesExamples - Scyphozoan polyps and medusae exhibit no cephalization and contain no brain, but in some species, light-sensitive eyespots are located along the bell margin of the medusa.
- Cnidarians have two basic body forms, medusa and polyp.
- Two major adult body types characterize the phylum: the medusa is typically a mobile pelagic organism, and the polyp is typically a sessile benthic organism.
- In polyps, medusae, and worms, all longitudinal and circumferential muscles attach to the thin body wall over a wide area.
- A medusa, or jellyfish, is part of the life cycle of just one major group of animals, the cnidarians.
- 1.1 A jellyfish.
水母，海蜇 Example sentencesExamples - Predation by an abundance of medusae on zooplankton and ichthyoplankton could affect the North Sea ecosystem through top-down and bottom-up mechanisms.
- This specialized tank creates a waterflow that keeps medusae and other delicate animals in constant suspension assuring that their tissues are not destroyed by abrasive contact with aquarium walls.
- Remaining undigested by the medusa, the small snail will devour its host from within, growing larger as its host is correspondingly diminished in size.
- Noteably, all epipelagic, midwater, and deepsea medusae have very simple, reduced, or absent ocelli.
- In studies with a microscope, Forbes had shown that hydroid jellyfish known as naked-eyed medusae reproduce not only by spewing eggs, but also by asexual budding, which he found marvelous to behold.
OriginMid 18th century: named by association with Medusa. proper noun Greek Mythology The only mortal gorgon, whom Perseus killed by cutting off her head.
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