| rolling condition |
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 |
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