gemmule

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gemmule

 [jem´ūl]
1. a reproductive bud, the immediate product of gemmation.
2. any of the little spinelike processes on the dendrites of a nerve cell.

gem·mule

(jem'yūl),
1. A small bud that projects from the parent cell, and finally becomes detached, forming a cell of a new generation.
2. Synonym(s): dendritic spines
[L. gemmula, dim. of gemma, bud]

gemmule

/gem·mule/ (jem´ūl)
1. a reproductive bud; the immediate product of gemmation.
2. one of the many little spinelike processes on the dendrites of a neuron.

gemmule

(jĕm′yo͞ol)
n.
1. A small gemma or similar structure, especially a reproductive structure in certain sponges that remains dormant for some time and later develops into a new individual.
2. A hypothetical particle in the theory of pangenesis, postulated to be produced by cells and to be responsible for transmitting traits from parent to offspring.

gem′mu·lif′er·ous (jĕm′yo͞o-lĭf′ər-əs) adj.

gemmule

See gemma.

gem·mule

(jem'yūl)
1. A small bud that projects from the parent cell, and finally becomes detached, forming a cell of a new generation.
2. Synonym(s): dendritic spines.
[L. gemmula, dim. of gemma, bud]

gemmule

a bud formed in sponges as an internal group of cells that gives rise to a new sponge after overwintering (in freshwater forms) and the decay of the parent.

gemmule

1. a reproductive bud; the immediate product of gemmation.
2. any of the little spinelike processes on the dendrites of a nerve cell.
References in periodicals archive ?
It is, indeed obvious that the presence of gemmules in the blood can form no necessary part of my hypothesis; for I refer in illustration of it to the lowest animals, such as the Protozoa, which do not possess blood or any vessels; and I refer to plants in which the fluid, when present in the vessels, cannot be considered as true blood.
There is no evidence that anyone again attempted an experiment to determine the veracity of pangenesis and its messenger gemmules.
If pangenesis operated properly and the gemmules were transferred, he predicted that the offspring from those rabbits would not breed true.
This is also a wonderful example of what Karl Popper (1963) called "conjecture and refutation," an intellectual process whereby ideas related to the underlying principle (in this case the gemmules of pangenesis) are proposed and then subjected to experiment in an attempt to reject them.
Darwin suggested that the gemmules were physical entities and that, as such, other scientists could look for them or for their effects.
Gemmules were lightly visible throughout the sample and were brown to black in color (Figure 1, left).
Hatching of freshwater sponge gemmules after low temperature exposure: Ephydatia mulleri (Porifera: Spongillidae).