Answer: gnomons

AnswerCrossword Clue
GNOMONSSundial styles
GNOMONSVertical plates of sundials.
GNOMONSPins of a sundial.
GNOMONSSundial parts
gnomons(formerly) the part of a parallelogram that remains after a similar parallelogram has been taken away from one of its corners
gnomonsthe raised part of a sundial that casts the shadow; a style
gnomonsearly astronomical instrument consisting of a vertical shaft, column, or the like, for determining the altitude of the sun or the latitude of a position by measuring the length of its shadow cast at noon
gnomonsGNOMON, the pointer of a sundial