arachˈnid noun

Any member of the class

arachˈnidan noun and adjective

arachˈnoid adjective

1. Of or like the Arachnida
2. Like a cobweb, formed of or covered with fine interwoven hairs or fibres (botany and zoology)

The arachnoid membrane

arachnoiˈdal adjective

arachnoidīˈtis noun (medicine)

Inflammation of the arachnoid membrane

arachnologˈical adjective

arachnolˈogist noun

A person who studies the Arachnida

arachnolˈogy noun

arachˈnophobe noun

A person suffering from an extreme fear of spiders

arachnophōˈbia noun

arachnophōˈbic adjective

arachnoid membrane noun (anatomy and zoology)

One of the three coverings of the brain and spinal cord, between the dura mater and pia mater, non-vascular, transparent and thin