rachischisisyoudaoicibaDictYouDict
"Defective closure of one or more vertebrae, usually involving the posterior part of the arch and often accompanied by myelocele; spina bifida", Late 19th cent.; earliest use found in The Lancet. From rachi- + ancient Greek σχίσις cleavage (from σχίζειν to split + -σις).
rhetoryoudaoicibaDictYouDict
"(In ancient Greece and Rome) a teacher of rhetoric", Via Latin from Greek rhētōr.
rotundifoliousyoudaoicibaDictYouDict
"Having round leaves", Early 18th century; earliest use found in Nathan Bailey (d. 1742), lexicographer and schoolmaster. From post-classical Latin rotundifolius + -ous.
ratoonyoudaoicibaDictYouDict
"A new shoot or sprout springing from the base of a crop plant, especially sugar cane, after cropping", Mid 17th century: from Spanish retoño 'a sprout'.
relievoyoudaoicibaDictYouDict
"Another term for relief (sense 4)", Italian rilievo.