cardioid

is likely misspelled.

has no English definition.

As a noun cardioid

is an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped.

As an adjective cardioid

is having this characteristic shape.

As nouns the difference between cardioid and caridoid

is that cardioid is (geometry) an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped while caridoid is any of various crustaceans related to shrimp.

As adjectives the difference between cardioid and caridoid

is that cardioid is having this characteristic shape while caridoid is of or relating to caridoids; being a caridoid.

As nouns the difference between cardiid and cardioid

is that cardiid is (zoology) any member of the cardiidae while cardioid is (geometry) an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped.

As an adjective cardioid is

having this characteristic shape.

As nouns the difference between cardioid and carditid

is that cardioid is (geometry) an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped while carditid is (zoology) any member of the carditidae.

As an adjective cardioid

is having this characteristic shape.

As nouns the difference between taxonomy and cardioid

is that taxonomy is the science or the technique used to make a classification while cardioid is (geometry) an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped.

As an adjective cardioid is

having this characteristic shape.

As nouns the difference between cardioid and conchoid

is that cardioid is (geometry) an epicycloid with exactly one cusp; the plane curve with polar equation $\backslash rho\; =\; 1\; +\; \backslash cos\backslash ,\backslash theta$ - having a shape supposedly heart-shaped while conchoid is (mathematics|geometry) any of a family of curves defined as the locus of points p'', such that each ''p'' is on a line that passes through a given fixed point ''p'' and intersects a given curve, ''c'', and the distance from ''p'' to the point of intersection with ''c'' is a specified constant (note that for nontrivial cases two such points ''p satisfy the criteria, and the resultant curve has two parts).

As an adjective cardioid

is having this characteristic shape.