Plural of conchoid; mathematical curves that resemble the shape of shells, generated by specific geometric constructions and appearing in engineering and natural phenomena.
From Greek konkhē (shell) plus -oid (resembling), creating a term that literally means 'shell-shaped.' The plural indicates multiple such curves or instances.
Conchoids appear in fracture patterns of minerals, the shape of animal shells, and even wind patterns around buildings—mathematicians named them 'shell-shaped' because ancient scholars first noticed these curves when analyzing shell geometry.
Complete word intelligence in one call. Free tier — 50 lookups/day.