Descriptively

Syndromes are often named after the physician or group of physicians who discovered them or initially described the full clinical picture. Such eponymous syndrome names are examples of medical eponyms. Recently, there has been a shift towards naming conditions descriptively (by symptoms or underlying cause) rather than eponymously, but the eponymous syndrome names often persist in common usage.

He snapped his fingers descriptively.

Type D half-lines ending in words of this type are analysed by Hutcheson as ending in two completely unstressed syllables. That analysis must be descriptively correct for, say, the 10th cent.; whether it would have fitted the facts in the 8th cent. is much less clear.