cycloid

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cy·cloid

(sī'kloyd),
Suggesting cyclothymia; a term applied to personality traits associated with cyclothymia.
[cyclo- + G. eidos, resembling]

cycloid

(sī′kloid′)
adj.
1. Resembling a circle.
2. Psychology Afflicted with or relating to cyclothymia.

cy·cloi′dal (-kloid′l) adj.

cycloid

(sī′kloyd) [″ + eidos, form, shape]
1. Resembling a circle.
2. Denoting a ring of atoms.
3. Extreme variations of mood from elation to melancholia.
References in periodicals archive ?
Cycloid. Consider a circle of radius r which is rolling along another circle of radius R or along a straight line.
Creep feed grinding is characterized by a comma-shaped course of grain path (Figure 1.a) caused by the superposition of two subsequent cycloid arches.
The cycloid was first coined by Galileo (Schwartzman, 1994), and comes from circle with the '-oid' suffix used in the sense of 'having to do with'.
However, while the Samaras team was inside the tornado/MVMC, already in poor conditions and surrounded by even more intense winds, an interior subvortex, which transcribed a prolate cycloid path for the preceding ~200 s, intensified just 500 m to their south-southeast and moved north-northwestward, becoming nearly stationary just east of their vehicle.