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| a hollow space within the body, an organ or a bone |
| a small cavity in the epidermis and corium of the skin, from which a hair develops |
| arachnoid (əˈræknɔɪd) | |
| —n | |
| 1. | See meninges the middle of the three membranes that cover the brain and spinal cord |
| 2. | another name for arachnid |
| —adj | |
| 3. | of or relating to the middle of the three meninges |
| 4. | botany consisting of or covered with soft fine hairs or fibres |
| 5. | of or relating to the arachnids |
arachnoid a·rach·noid (ə-rāk'noid')
adj.
Resembling a cobweb. Used of the arachnoid membrane covering the brain and spinal cord.
| arachnoid (ə-rāk'noid') Pronunciation Key
The delicate membrane that encloses the spinal cord and brain and lies between the pia mater and dura mater. |