| rolling friction |
roll-in roll-out |
Rollo (860–931) |
rollover |
rollover anticline |
| roll-over of loans |
roll reversal |
roll stationery |
roll-type uranium ore |
ROM |
| Roman Britain (43–410) |
Roman Catholic Church |
Roman civil wars |
Roman empire |
Romanenko, Roman (1971– ) |
| Romanenko, Yury (1944– ) |
Romania |
Romanian Space Agency |
Romankov number |
Roman law |
| Roman legion |
Roman numeral |
Romanov |
Roman religion |
Roman republic |
| Roman roads |
Roman Senate |
Romanticism |
Romberg method |
Romer, Alfred Sherwood |
| Romer, Alfred Sherwood (1894–1973) |
Rome, Treaties of (1957) |
Rominger, Kent Vernon (1956– ) |
Rommel, Erwin (1891–1944) |
ROM optical disk |
| romware |
Ronchi test |
Rood–Sastry type |
roof pendant |
roof prism |
| roof thrust |
rook |
room and pillar |
Roosa, Stuart Allen (1933–94) |
Roosevelt, Franklin D. (1882–1945) |
| Roosevelt, Theodore (1858–1919) |
root |
root cap |
root certificate |
root directory |
| rooted tree |
root hair |
rootkit |
rootlet |
root locus |
| root mass ratio |
root-mean-square |
root mean squared deviation |
root mean squared error |
root-mean-square value |
| root-mean-square velocity |
root nodule |
root(of an equation) |
root(of a tree) |
root of unity |
| rootogram |
root pressure |
Roots blower |
rootstock |
root test |
| root zone |
rope |
rope bomb |
Roque de los Muchachos Observatory |
Rorarius, Hieronymus (1485–1556) |
| Rorty, Richard McKay (1931–2007) |
ROS |
ROSA |
Rosalind |
Rosas, Juan Manuel de (1793–1877) |
| ROSAT |
Rosat |
Rosaviakosmos |
Roscelin de Compiègne (c.1050–c.1125) |
ROSCOSMOS |
| Roscosmos |
ROSDAL |
ROSE |
rose |
Rosebery, Archibald Philip Primrose, 5th Earl of (1847–1929) |
| rose diagram |
Rose Garden |
Rosenbaum test |
Rosenberg case (1953) |
Rosenbrock pattern search |
| rose quartz |
Rose Revolution (2003) |
Roses, Wars of the (1455–85) |
Rosetta |
Rosetta stone |
| Rosette Nebula |
Rose, William Cumming |
Rose’s metal |
Rosicrucian |
Rosicrucianism |
| rosin |
Roskilde, Treaty of (1658) |
Rosmini-Serbati, Antonio (1797–1855) |
Rosner test |
Ross, Alf (1899–1979) |
| Rossby, Carl-Gustaf Arvid |
Rossby waves |
Rosseland mean opacity |
Rosse, Third Earl of (1800–67) |
Rosse, William Parsons |
| Ross, Frank Elmore (1874–1960) |
Rossi, Bruno Benedetti |
Rossi, Bruno Benedetto (1905–93) |
Rossiter effect |
Rossi X-Ray Timing Explorer |
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