As an adjective cartilaginous

is comprising of soft cartilage rather than bones.

As a noun elasmobranch is

any of many cartilaginous fish of the subclass elasmobranchii .

As a proper noun fish

is .

As a noun elasmobranch is

any of many cartilaginous fish of the subclass elasmobranchii .

As a proper noun elasmobranchii

is .

As a noun elasmobranch is

any of many cartilaginous fish of the subclass elasmobranchii .

As nouns the difference between border and platband

is that border is while platband is a border of flowers in a garden, especially along a wall; a strip of turf forming a border.

As nouns the difference between turf and platband

is that turf is a layer of earth covered with grass; sod while platband is a border of flowers in a garden, especially along a wall; a strip of turf forming a border.

As a verb turf

is to create a lawn by laying turfs.

As a verb secreted

is (us) (secret) or secreted can be (secrete).

As a noun ectodin is

(biology) a secreted inhibitor of bone morphogenetic proteins.

As nouns the difference between inhibitor and ectodin

is that inhibitor is inhibitor (all senses) while ectodin is (biology) a secreted inhibitor of bone morphogenetic proteins.

As nouns the difference between basis and eigenbasis

is that basis is a starting point, base or foundation for an argument or hypothesis while eigenbasis is a basis for a vector space consisting entirely of eigenvectors.

As nouns the difference between eigenvector and eigenbasis

is that eigenvector is a vector that is not rotated under a given linear transformation; a left or right eigenvector depending on context while eigenbasis is a basis for a vector space consisting entirely of eigenvectors.

As nouns the difference between eigenfunction and eigenenergy

is that eigenfunction is (mathematics) a function $\backslash phi$ such that, for a given linear operator $d$, $d\backslash phi=\backslash lambda\backslash phi$ for some scalar $\backslash lambda$ (called an eigenvalue) while eigenenergy is (physics) the energy associated with an eigenfunction.