R
- 1 RAY
- 2 REAUMUR (Rene - Antoine - Ferchault, Sieur de)
- 3 RECEIVER
- 4 RECEPTION
- 5 RECIPROCAL
- 6 RECKONING
- 7 RECLINER
- 8 RECOIL
- 9 RECORDE (Robert)
- 10 RECTANGLE
- 11 RECTANGLED
- 12 RECTIFICATION
- 13 RECTIFIER
- 14 RECTILINEAL
- 15 RED
- 16 REDANS
- 17 REDINTEGRATION
- 18 REDOUBT
- 19 REDUCTION
- 20 REFLECTING
- 1 REFLECTION
- 2 REFRACTION
- 3 REGEL
- 4 REGION
- 5 REGIS (Peter Sylvain)
- 6 REGRESSION
- 7 REGULUS
- 8 REINFORCE
- 9 REINHOLD (Erasmus)
- 10 RELAIS
- 11 RELATION
- 12 RELIEVO
- 13 REMAINDER
- 14 RENDERING
- 15 REPETEND
- 16 RESISTANCE
- 17 RESOLUTION
- 18 REST
- 19 RESTITUTION
- 20 RETARDATION
- 1 RETICULA
- 2 RETIRED Flank
- 3 RETROGRADATION
- 4 RETROGRADE
- 5 RETROGRESSION
- 6 REVETEMENT
- 7 REVOLUTION
- 8 REYNEAU (Charles-Rene)
- 9 RHABDOLOGY
- 10 RHETICUS (George Joachim)
- 11 RHOMB Solid
- 12 RHOMBOID
- 13 RHOMBUS
- 14 RHUMB
- 15 RICCIOLI (Joannes Baptista)
- 16 RIDEAU
- 17 RIFLE Guns
- 18 RIGEL
- 19 RIGHT
- 20 RIGIDITY
- 1 RING
- 2 RISING
- 3 RIVER
- 4 RIXDOLLAR
- 5 ROBERVAL (Giles-Personne)
- 6 ROBINS (Benjamin)
- 7 ROBINS
- 8 ROCKET
- 9 ROD
- 10 ROEMER (Olaus)
- 11 ROHAULT (James)
- 12 ROLLE (Michel)
- 13 ROLLING
- 14 RONDEL
- 15 ROOD
- 16 ROOF
- 17 ROOKE (Lawrence)
- 18 ROOT
- 19 ROTA
- 20 ROTATION
- 1 ROTONDO
- 2 ROUND
- 3 ROWNING (John)
- 4 RULE
- 5 RUMB
- 6 RUSTIC
- 7 RUTHERFORD (Thomas, D. D.)
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