annual ring
noun
an annual formation of wood in plants, consisting of two concentric layers, one of springwood and one of summerwood.
Also called
growth ring,
tree ring.
Origin of annual ring
First recorded in 1875–80
Words nearby annual ring
British Dictionary definitions for annual ring
annual ring
noun
a ring of wood indicating one year's growth, seen in the transverse section of stems and roots of woody plants growing in temperate climates
Also called: tree ring
Scientific definitions for annual ring
annual ring
See under growth ring.