1. Resembling a spider's web; belonging to the arachnida. The arachnoid tunic, a thin membrane spread over the brain and spinal cord between the dura mater and the pia mater; a fine slender tunic, encompassing the crystalline humour of the eye.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• arachniod,
• arachoid,
• arachnoida,
• zrachnoid,
• srachnoid,
• wrachnoid,
• qrachnoid,
• aeachnoid,
• adachnoid,
• afachnoid,
• atachnoid,
• a5achnoid,
• a4achnoid,
• arachnoiod,
• arachnoide,
• archnoid,
• aracnoid,
• aarchnoid,
• arachnoidaal,
• arachnoidall

• arachnida,
• arachnid,
• arachnidian,
• arciniega,
• arraign.

The adjective form of the word "arachnoid" is "arachnoid".

The plural of the "arachnoid" can be the "arachnoids".

The singular of the "arachnoid" can be the "arachnoid".