2. (Zoˆl.) Shaped like a snail shell; pertaining to the HelicidÊ, or
Snail family.
Helicoid parabola (Math.), the parabolic spiral.
Hel"i*coid, n. (Geom.) A warped surface which may be generated by a
straight line moving in such a manner that every point of the line
shall have a uniform motion in the direction of another fixed straight
line, and at the same time a uniform angular motion about it.
Hel`i*coid"al (?), a. Same as Helicoid. -- Hel`i*coid"al*ly, adv.
Hel"i*con (?), n. [L., fr. Gr. &?;.] A mountain in Búotia, in Greece,
supposed by the Greeks to be the residence of Apollo and the Muses.
From Helicon's harmonious springs A thousand rills their mazy
progress take.
Gray.
||Hel`i*co"ni*a (?), n. [NL. See Helicon.] (Zoˆl.) One of numerous
||species of Heliconius, a genus of tropical American butterflies. The
||wings are usually black, marked with green, crimson, and white.
Hel`i*co"ni*an (?), a. [L. Heliconius.] 1. Of or pertaining to Helicon.
"Heliconian honey." Tennyson.
2. (Zoˆl.) Like or pertaining to the butterflies of the genus
Heliconius.
||Hel`i*co"tre"ma (?), n. [NL., fr. Gr. "e`lix, -ikos, a helix + &?; a
||hole.] (Anat.) The opening by which the two scalÊ communicate at the
||top of the cochlea of the ear.
He"li*o- (?). A combining form from Gr. "h`lios the sun.
{ He`li*o*cen"tric (?), He`li*o*cen"tric"al (?), } a. [Helio- +
centric, centrical: cf. F. hÈliocentrique.] (Astron.) pertaining to the
sun's center, or appearing to be seen from it; having, or relating to,
the sun as a center; -- opposed to geocentrical.
Heliocentric parallax. See under Parallax. -- Heliocentric place,
latitude, longitude, etc. (of a heavenly body), the direction,
latitude, longitude, etc., of the body as viewed from the sun.
He"li*o*chrome (?), n. [Helio- + Gr. &?; color.] A photograph in
colors. R. Hunt.
He`li*o*chro"mic (?), a. Pertaining to, or produced by, heliochromy.
He"li*o*chro`my (?), n. The art of producing photographs in color.