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A Roman emperor notorius for debauchery and barbarous cruelty; hence, any profligate and cruel ruler or merciless tyrant. -- Ne*ro"ni*an, a.

A beautiful black marble found in fragments among Roman ruins, and usually thought to have come from ancient Laconia.

tion from the flowers of the orange. It has a strong odor, and is used in perfumery, etc. Neroli camphor (Chem.), a white crystalline waxy substance, tasteless and odorless, obtained from beroli oil; -- called also auradin.

Containing no liquid; -- said of kind of barometer. Aneroid barometer, a barometer the action of which depends on the varying pressure of the atmosphere upon the elastic top of a metallic box (shaped like a watch) from which the air has been exhausted. An index shows the variation of pressure.

A banderole; esp. a banner displayed at a funeral procession and set over the tomb. See Banderole.

The bellbird of South America. See Bellbird.

Allied in origin or cause; congeneric; as, congenerous diseases. [Obs.] Sir T. Browne.

Degenerate; base. [Obs.] "Degenerous passions." Dryden. "Degenerous practices." South.

Basely. [Obs.]

The quality of being noble; noble-mindedness. Generosity is in nothing more seen than in a candid estimation of other men's virtues and good qualities. Barrow.

Of honorable birth or origin; highborn. [Obs.] The generous and gravest citizens. Shak.

Same as Holometabolic.

One of the inhabitants of the llanos of South America.

One of the Monera.

Having many kinds.

Burdensome; oppressive. "Too onerous a solicitude." I. Taylor. Onerous cause (Scots Law), a good and legal consideration; -- opposed to gratuitous.

In an onerous manner.

Same as Acraspeda.

Having an umbrella-shaped or bell-shaped body, with a wide, open cavity beneath; -- said of certain jellyfishes.

Distinctly crystalline; -- used of rocks. Opposed to Ant: cryptocrystalline.