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Rhipidoglossa
- A division of gastropod mollusks having a large number of long, divergent, hooklike, lingual teeth in each transverse row. It includes the scutibranchs. See Illustration in Appendix.
Rhipipter
- One of the Rhipiptera, a group of insects having wings which fold like a fan; a strepsipter.
Rhizanthous
- Producing flowers from a rootstock, or apparently from a root.
Rhizine
- A rootlike filament or hair growing from the stems of mosses or on lichens; a rhizoid.
Rhizocarpous
- Having perennial rootstocks or bulbs, but annual flowering stems; -- said of all perennial herbs.
Rhizocephala
- A division of Pectostraca including saclike parasites of Crustacea. They adhere by rootlike extensions of the head. See Illusration in Appendix.
Rhizodont
- A reptile whose teeth are rooted in sockets, as the crocodile.
Rhizogen
- One of a proposed class of flowering plants growning on the roots of other plants and destitute of green foliage.