from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic order within the superorder Heterobranchia — the air-breathing slugs and snails.
from the GNU version of the Collaborative International Dictionary of English
- n.pl. An extensive division, or sub-class, of hermaphrodite gastropods, in which the mantle cavity is modified into an air-breathing organ, as in Helix, or land snails, Limax, or garden slugs, and many pond snails, as Limnæa and Planorbis.
from The Century Dictionary and Cyclopedia
- In conchology: An order or subclass of Gasteropoda, air-breathing and adapted to a terrestrial life; the true pulmonate or pulmoniferous gastropods, as snails and slugs, having the pallial cavity or mantle-chamber converted into a lung-sac, no ctenidia or true gills, and generally no true operculum to the shell.
- A section of rhipidoglossate gastropods, characterized by adaptation for aërial respiration, and including the families Helicinidæ, Hydrocenidæ, and Proserpinidæ.
- In entomology, the pulmonary arachnidans: same as Pulmonaria, 2.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. large order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails
Latin pulmonem, lungs (Wiktionary)