chalk

nouns

a soft whitish calcite
is derived from
is made of
a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
is a type of (narrower)
a common mineral consisting of crystallized calcium carbonate; a major constituent of limestone
a pure flat white with little reflectance
is derived from
is a type of (narrower)
the quality or state of the achromatic color of greatest lightness (bearing the least resemblance to black)
an amphetamine derivative (trade name Methedrine) used in the form of a crystalline hydrochloride; used as a stimulant to the nervous system and as an appetite suppressant
a piece of calcite or a similar substance, usually in the shape of a crayon, that is used to write or draw on blackboards or other flat surfaces
is derived from
is a type of (narrower)
an implement that is used to write

verbs

write, draw, or trace with chalk
entails
make a mark or lines on a surface
"draw a line"; "trace the outline of a figure in the sand"
is a type of (narrower)
represent by making a drawing of, as with a pencil, chalk, etc. on a surface
"She drew an elephant"; "Draw me a horse"