See Also: praeoperculum(medicine)

phenanthroline (iou) and praeoperculum (medicine)


phenanthroline (iou)



phenanthroline noun. L19.
[from PHENANTHR(ENE + QUIN)OLINE.]
Chemistry. A heteroaromatic organic compound, C12H8N2, whose molecule is based on a phenanthrene ring system, used as an indicator for iron.

praeoperculum (medicine)


praeoperculum
<anatomy> Same as Preoperculum. Praeoper"cular.

Source: Websters Dictionary