Back Spinnerakvlies Afrikaans أم عنكبوتية Arabic Aracnoide (anatomia) Catalan Pavučnice Czech Spindelhinden Danish Araknoido Esperanto Aracnoides Spanish Ämblikuvõrkkest Estonian Araknoide mintz Basque عنکبوتیه Persian
| Arachnoid mater | |
|---|---|
 Image showing arachnoid mater and the underlying subarachnoid space | |
 Image showing parts of the arachnoid mater, including arachnoid granulations. | |
| Details | |
| Part of | Meninges |
| Identifiers | |
| Latin | arachnoidea mater |
| MeSH | D001099 |
| NeuroNames | 1464 |
| TA98 | A14.1.01.201 |
| TA2 | 5386 |
| FMA | 9591 |
| Anatomical terms of neuroanatomy | |
The arachnoid mater (or simply arachnoid) is one of the three meninges, the protective membranes that cover the brain and spinal cord. It is so named because of its resemblance to a spider web. The arachnoid mater is a derivative of the neural crest mesoectoderm in the embryo.