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Retinula
- One of the group of pigmented cells which surround the retinophorae of invertebrates. See Illust. under Ommatidium.
Retinulate
- Having, or characterized by, retinul
Retiped
- A bird having small polygonal scales covering the tarsi.
Retiracy
- Retirement; -- mostly used in a jocose or burlesque way.
Retirade
- A kind of retrenchment, as in the body of a bastion, which may be disputed inch by inch after the defenses are dismantled. It usually consists of two faces which make a reentering angle.
Retistene
- A white crystalline hydrocarbon produced indirectly from retene.
Retitelae
- A group of spiders which spin irregular webs; -- called also Retitelariae.