1. helicoid - Noun
2. helicoid - Adjective
Spiral; curved, like the spire of a univalve shell.
Shaped like a snail shell; pertaining to the Helicidae, or Snail family.
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.
Source: Webster's dictionaryEach granum can contain anywhere from two to a hundred thylakoids, though grana with 10–20 thylakoids are most common. citation Wrapped around the grana are helicoid stromal thylakoids, also known as frets or lamellar thylakoids. Source: Internet
Stromal thylakoids are helicoid sheets that spiral around grana. Source: Internet
In addition, these particles can also jam or otherwise hinder the focusing feature of a lens if they enter into the focusing helicoid. Source: Internet
This water is then pushed up the tube by the rotating helicoid until finally it pours out from the top of the tube. Source: Internet