|
|
Definition of Nematocyst
1. n. A lasso cell, or thread cell. See Lasso cell, under Lasso.
Definition of Nematocyst
1. Noun. (biology) A capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting ¹
¹ Source: wiktionary.com
Definition of Nematocyst
1. [n -S]
Medical Definition of Nematocyst
1. Stinging mechanism used for defence and prey capture by Hydra and other members of the Cnidaria (Coelenterata). It is located within a specialised cell, the nematocyte and consists of a capsule containing a coiled tube. When the nematocyte is triggered, the wall of the capsule changes its water permeability and the inrush of water causes the tube to evert explosively ejecting the nematocyst from the cell. The tube is commonly armed with barbs and may also contain toxin. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Nematocyst
Literary usage of Nematocyst
Below you will find example usage of this term as found in modern and/or classical literature:
1. Journal of Applied Microscopy by Bausch & Lomb Optical Company (1903)
"A Method for Demonstrating nematocyst Cells in Hydra. I. Slides prepared by the
following method will be found helpful in demonstrating to a beginning class ..."
2. The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, Literature and (1910)
"A large nematocyst, with everted thread, is seen in the right-hand ectodermal cell.
(After FE Schulze.) elements, more especially by nervous (ganglion) ..."
3. The Cambridge Natural History by Arthur Everett Shipley, Sidney Frederic Harmer (1906)
"When the nematocyst is fully developed and receives a stimulus of a certain
character, the thread is shot out with great velocity and causes a sting on any ..."
4. Proceedings of the Cambridge Philosophical Society by Cambridge Philosophical Society (1900)
"The thread ends freely in an invaginated portion at the end of the nematocyst,
which forms the base of the everted thread. This basal portion, when everted, ..."
5. Medusae of the World by Alfred Goldsborough Mayer (1910)
"Surfaces of these tentacles covered with prominent nematocyst capsules. ...
The bell is covered with reticulated clusters of nematocyst-cells (plate 4, ..."
6. Animal Structures: A Laboratory Guide in the Teaching of Elementary Zoology by David Starr Jordan, George Clinton Price (1903)
"Extending into this nematocyst from the small end is a structure which will later
... If viewed from the end, instead of from the side, the nematocyst will ..."
7. An Introduction to the Study of the Comparative Anatomy of Animals by Gilbert Charles Bourne (1900)
"Cl; a large oval nematocyst with the thread coiled up, enclosed in a ... D, an
elongate oval nematocyst, showing the short relatively thick thread everted. ..."
Other Resources:
