(medicine) Relating to a monitoring protocol for neuromuscular blockade, where the muscle response to four consecutive stimuli delivered along the path of a nerve is measured to determine the level of blockade.

(medicine, informal) The neuromuscular blockade monitoring method described above.

plural of four-legged

plural of four L

(law) The face of a document or its contents, considered without reference to any outside information.

Any of various satyrine butterflies of the genus Ypthima, having circular markings on the wings.

plural of four-ring / (slang, informal) An Audi automobile, in reference to the logo which is four interconnected rings.

(historical) The four traditional things targeted for destruction during China's Cultural Revolution, usually translated as old customs, old culture, old habits, and old ideas.

(poker) The rule of multiplying the number of outs by four to discover one's approximate chance to make one's hand on the turn or river. Compare rule of two.

off-roading in a vehicle with four-wheel drive