The Collaborative International Dictionary
Arachnitis
Arachnitis \Ar`ach*ni"tis\, n. [Gr. ? + ?.] (Med.) Inflammation of the arachnoid membrane.
Wiktionary
arachnitis
n. (alternative form of arachnoiditis English)
Wikipedia
Arachnitis
Arachnitis uniflora, the sole species in the genus Arachnitis, is a non- photosynthetic species of plant. It is a myco-heterotroph which gets many of its nutrients from fungi of the genus Glomus which live in its roots.
It is native to southern South America ( Bolivia, Chile, Argentina) and the Falkland Islands ( Islas Malvinas).