英语词源字典 - 在线词源网站

Rx [Rx 词源字典]: "A doctor’s prescription", Abbreviation of Latin recipe! 'take!'.[Rx etymology, Rx origin, 英语词源]
ryegrass: "A Eurasian grass which is a valuable fodder and lawn grass", Early 18th century: alteration of obsolete ray-grass, of unknown origin.
roentgenium: "The chemical element of atomic number 111, a radioactive element produced artificially", Early 21st century: named after Wilhelm Conrad Röntgen (see roentgen).
retractability: "Ability (of a component part) to be retracted", Mid 19th cent.; earliest use found in The Penny Magazine. From retractable + -ity: see -bility.
restrictor: "A person who or thing which restricts something", Early 19th cent.; earliest use found in John Stuart Mill (1806–1873), philosopher, economist, and advocate of women's rights. From restrict + -or.
rani: "A Hindu queen", From Hindi rānī, Sanskrit rājñī, feminine of rājan 'king'.
raring: "Very enthusiastic and eager to do something", 1920s: present participle of rare, dialect variant of roar or rear².
rapeseed: "Seeds of the rape plant, used chiefly for oil", Late Middle English: from rape² + seed.
Rawlplug: "A thin plastic or fibre sheath that is inserted into a hole in masonry in order to hold a screw", Early 20th century: from Rawlings (the name of the engineers who introduced it) + plug.
refection: "Refreshment by food or drink", Middle English: from Old French, from Latin refectio(n-), from reficere 'renew' (see refectory).
Rana: "A Hindu (especially Rajput) prince or raja; specifically a member of the family of Rajput origin which effectively ruled Nepal from 1846 to 1951. Also used as a title. Now historical", Mid 17th cent.; earliest use found in Henry Lord (b. 1563), clergyman and ethnographer. Partly from Marathi rāṇā and Rajasthani rāṇā, the title of a king or prince among Rajputs, and partly (in later use) from Hindi rānā and Nepali rānā, all ultimately from Sanskrit rājn-, oblique stem of rājan.
residuum: "A chemical residue", Late 17th century: from Latin, neuter of residuus 'remaining', from the verb residere.
rondavel: "A traditional circular African dwelling with a conical thatched roof", From Afrikaans rondawel.
rollmop: "A rolled uncooked pickled herring fillet", Early 20th century: from German Rollmops.
Rafferty's rules: "No rules at all", 1920s: Rafferty, probably an English dialect alteration of refractory.
refractable: "Capable of being refracted; susceptible to refraction", Late 17th cent.; earliest use found in Henry More (1614–1687), philosopher, poet, and theologian.
revendication: "The action of claiming back or recovering something, especially by a formal claim", Mid 18th cent. From French revendication action of claiming back or recovering a rightful possession, alteration (after re-) of reivendication from post-classical Latin rei vindicatio from classical Latin reī, genitive of rēs thing + vindicātiō action (or right) or suing for possession of (an object of which one claims ownership).
revendication: "The action of claiming back or recovering something, especially by a formal claim", Mid 18th cent. From French revendication action of claiming back or recovering a rightful possession, alteration (after re-) of reivendication from post-classical Latin rei vindicatio from classical Latin reī, genitive of rēs thing + vindicātiō action (or right) or suing for possession of (an object of which one claims ownership).
Richard Roe: "A name given to: a hypothetical (male) person, or one whose real name is unknown or withheld", Late 16th cent. From the male forename Richard + the surname Roe.
rudenture: "A convex moulding or ornament in the form of a rope", Early 18th cent.; earliest use found in Ephraim Chambers (?1680–1740), encyclopaedist. From French rudenture from rudenté + -ure.