R

• Behnken unit;

• Broadbent registration point;

• any chemical group [particularly an alfyl group];

• a conjugative plasmid responsible for resistance to various elements;

• electrical resistance;

• in electrocardiography, the first positive deflection during the QRS complex [wave];

• far point [Lat. remotum];

• gas constant;

• organic radical;

• race;

• racemic;

• radioactive;

• radiology;

• radius;

• ramus;

• Rankine [scale];

• rapid accelerator;

• rate;

• rate modulation [pacemaker];

• ratio;

• reaction;

• Reaumur [scale];

• receptor;

• rectal;

• rectified;

• red;

• registered trademark;

• regression coefficient;

• regular;

• regular insulin;

• regulator [gene];

• rejection factor;

• relapse;

• relaxation;

• release [factor];

• remission;

• remote;

• reperfusion;

• repressor;

• residual tumor [TNM (tumor-node-metastasis) classification];

• residue;

• resistance;

• respiration;

• respiratory exchange ratio;

• respiratory quotient;

• response;

• responder;

• rest;

• restricted;

• reverse [banding];

• rhythm;

• ribose;

• Rickettsia;

• right;

• Rinne [test];

• roentgen;

• rough [colony];

• rub