Helicoid Definition

hĕlĭ-koid, hēlĭ-
adjective
Shaped like, or coiled in the form of, a spiral, as the shell of a snail or certain inflorescences.
Webster's New World
Arranged in or having the approximate shape of a flattened coil or spiral.
American Heritage
noun
A surface generated by the rotation of a plane or twisted curve about a fixed line so that each point of the curve traces out a circular helix with the fixed line as axis.
Webster's New World

Other Word Forms of Helicoid

Noun

Singular:
helicoid
Plural:
helicoids

Origin of Helicoid

  • Greek helikoeidēs helix helik- spiral helix -oeidēs -oid

    From American Heritage Dictionary of the English Language, 5th Edition

Helicoid Sentence Examples

  • The supposed hydrothecae may be present on one side of the axis only (monoprionid) or on both sides (diprionid); the first case may be conjectured to be the result of uniserial (helicoid) budding, the second to be produced by biserial (scorpioid) budding.

  • Neither the rotation of the shell as a whole nor its helicoid spiral coiling is the immediate cause of the torsion of the body in the individual, for the direction of the torsion is indicated in the segmentation of the ovum, in which there is a complete A B From Lankester's Treatise on Zoology.

  • Helicoid Cyme (axes forming a spiral).

  • In the helicoid cyme there is also a false axis formed by the basal portion of the separate axes, but the flowers are not placed in a double row, but in a single row, and form a spiral or helix round the false axis.

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Words Starting With

HHEHEL

Words Ending With

DIDOID

Unscrambles

helicoid

Words Starting With H and Ending With D

Starts With H & Ends With DStarts With HE & Ends With DStarts With H & Ends With ID

Word Length

8 Letter Words8 Letter Words Starting With H8 Letter Words Ending With D