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Rudistes
- An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; -- called also Rudista. See Illust. under Hippurite.
Rudmasday
- Either of the feasts of the Holy Cross, occuring on May 3 and September 14, annually.
Rudolphine
- Pertaining to, or designating, a set of astronomical tables computed by Kepler, and founded on the observations of Tycho Brahe; -- so named from Rudolph II., emperor of Germany.
Ruelle
- A private circle or assembly at a private house; a circle.
- 1archaic : the space between a bed and the wall
2: a morning reception held in their bedrooms by fashionable French ladies of the 17th and 18th centuries
3: a narrow street or alley
Rufescent
- Reddish; tinged with red.
Ruffe
- A small freshwater European perch (Acerina vulgaris); -- called also pope, blacktail, and stone perch, or striped perch.
Ruffianage
- Ruffians, collectively; a body of ruffians.
Ruffianish
- Having the qualities or manners of a ruffian; ruffianly.