helicoids = helicoidal

adj. Biol. १ (having the form of helicoid; coiled like a flat spring) हेलिकॉइडी Bot. २ (where successive daughter axes develop on the same side, in a uniparous cymose branching) एकतोविकासी Zool. ३ (specif. of a gastropod shell) हेलिकॉइडी n. Zool. (as, a surface resembling a screw thread) हेलिकॉइड (पु.)