adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   An epicycloid with exactly one cusp; the plane curve with polar equation ρ=1+ cos ,θ - approximately heart-shaped
2. 2
   an epicycloid in which the rolling circle equals the fixed circle wordnet

Adjective

1. 1
   Having this characteristic shape
2. 2
   sensitive in front, but not behind or at the sides

Synonyms

All synonyms

cardioidal

Etymology

By surface analysis, cardi- + -oid.

Related phrases

cardioid catacausticcardioid condensercardioid coordinatecardioid evolutecardioid inverse curvecardioid involutecardioid microphoneheart shapedplane curvepolar equation

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.