sedentaria

from The Century Dictionary.

• noun In Lamarck's classification (1801–12), one of three orders of Annelida, distinguished from Apoda and Antennata, and containing the sedentary or tubicolous worms: opposed to Errantia.
• noun 2. The sedentary spiders: same as Sedentariæ.
• noun 3. A suborder of peritrichous ciliate infusorians, containing those which are sedentary, as the Vorticellidæ: distinguished from Natantia.