| spinescent | Ending in a spine, modified to form a spine. (09 Oct 1997) |
|---|
| palatine spines | The longitudinal ridges along the palatine grooves on the inferior surface of the palatine process of the maxilla. Synonym: spinae palatinae. (05 Mar 2000) |
|---|---|
| penis spines | Epithelial excrescences on the glans of the p. Of the guinea pig and cat; they are under the influence of the male hormone. Synonym: penis thorns. (05 Mar 2000) |
| dendritic spines | Variably long excrescences of nerve cell dendrites, varying in shape from small knobs to thornlike or filamentous processes, usually more numerous on distal dendrite arborizations than on the proximal part of dendritic trunks; they are a preferential site of synaptic axodendritic contact; sparse or absent in some types of nerve cells (motor neurons, the large cells of the globus pallidus, stellate cells of the cerebral cortex), exceedingly numerous in others such as the pyramidal cells of the cerebral cortex and the Purkinje cells of the cerebellar cortex. Synonym: dendritic thorns, gemmule. (05 Mar 2000) |