(biochemistry) A series of chemical reactions within a cell which start when a transmembrane protein comes into contact with a chemical signal, resulting in a second messenger being triggered.

present participle of sightread

(mathematics) The signum function.

plural of sign function

(medicine) A particular component of a patient's vital signs

(idiomatic) To be unnoticeable, by staying visible in a setting that masks presence.

To be no longer able to see. / To fail to remember; to overlook or neglect.

Synonym of eye rhyme

(film, television, stage performance) A visually presented action or device which causes a humorous response without requiring any accompanying commentary or other speech.

(colloquial, uncountable) a large amount; a lot.