Noun:

மெதூசா,

medusa தமிழ் அர்த்தத்தின் உதாரணம்:

None

medusa's Usage Examples:

At the parting of the ways which led, on the one hand, to modern Scyphomedusae, on the other to Anthozoa (III.

Many groups bear at present two names, the one representing the group as defined by polyp-characters, the other as defined by medusa-characters.

This is a process of gastrulation by invagination which is found in all animals above the Coelenterata, but which is very rare in the Cnidaria, and is known only in the Scyphomedusae amongst the Hydrozoa.

Another medusan genus is Proboscidactyla.

The budding of this medusa has been worked out in detail by Chun (Hydrozoa, [1]), to whom the reader must be referred for the interesting laws of budding regulating the sequence and order of formation of the buds.

As yet, however, the medusa of Microhydra has only been seen in an immature condition, but it shows some well-marked differences from Limnocodium, especially in the structure of the tentacles, which furnish useful characters for distinguishing species amongst medusae.

The Hydromedusae represent, therefore, a sub-class of the Hydrozoa.

Haeckel regards it as the equivalent of the manubrium, and as it is implanted on the blind end of the pneumatophore, such a view leads necessarily to the air-sack and gland being a development on the ex-umbral surface of the medusa-person.

I), proving its medusan nature beyond all doubt.

The ovum of Hydromedusae is usually one of a large number of odgonia, and grows at the expense of its sister-cells.

In the polyp the nervous tissue is always in the form of a scattered plexus, never concentrated to form a definite nervous system as in the medusa.

), and that the inner ectoderm lining the cavity represents the sub-umbral ectoderm of the free medusa.

Synonyms:

medusan, phylum Cnidaria, medusoid, coelenterate, cnidarian, Cnidaria, Coelenterata, phylum Coelenterata,

Antonyms:

None