arachnodactyly a·rach·no·dac·ty·ly (ə-rāk’nō-dāk’tə-lē)
A condition in which the hands and fingers, and often the feet and toes, are abnormally long and slender, characteristic of Marfan syndrome.
resembling a spider’s web. of or belonging to the arachnids. Anatomy. of or relating to the arachnoid membrane. Botany. formed of or covered with long, delicate hairs or fibers. an arachnid. Anatomy. the serous membrane forming the middle of the three coverings of the brain and spinal cord. Historical Examples Meanwhile, we’re disgorging the arachnoid […]
- Arachnoid granulation
arachnoid granulation arachnoid granulation n. Any of numerous villuslike projections of the cranial arachnoid through the dura into the superior sagittal sinus or into its lateral venous lacunae. Also called arachnoid villus, pacchionian body.
- Arachnoid cyst
arachnoid cyst arachnoid cyst n. A fluid-filled cyst lined with arachnoid membrane, frequently situated in the sylvian fissure of the brain.
- Arachnoid membrane
arachnoid membrane arachnoid membrane n. A delicate fibrous membrane forming the middle of the three coverings of the brain and spinal cord, closely attached to the dura mater, from which it is separated only by the subdural cleft, but separated from the pia mater by the subarachnoid space.