from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A military trumpet.
- n. A curve with polar equation , where a is a constant.
from the GNU version of the Collaborative International Dictionary of English
- n. A curved staff used by the augurs in quartering the heavens.
- n. An instrument of martial music; a kind of trumpet of a somewhat curved form and shrill note.
- n. A spiral whose polar equation is r2θ = a; that is, a curve the square of whose radius vector varies inversely as the angle which the radius vector makes with a given line.
from The Century Dictionary and Cyclopedia
- n. In Roman antiquity: A staff with a recurved or crooked top, used by the augurs in quartering the heavens; an augural wand.
- n. An instrument of martial music; a kind of trumpet curved at the outer extremity, and having a shrill tone.
- n. A spiral of which the characteristic property is that the squares of any two radii vectores are reciprocally proportional to the angles which they respectively make with a certain line which is given in position and which is an asymptote to the spiral. This name was given by Cotes (died 1716).
- n. [capitalized] In zoology: A genus of cephalopods: same as Spirula.
- n. A genus of gastropods: same as Cyclostoma.
From Latin (Wiktionary)