English

interannular

From inter- + annular.

Proto-Indo-European *h₁én ‘in’

Proto-Indo-European *h₁entér ‘between’

Proto-Italic *n̥ter ‘between’

Latin inter ‘between’

Proto-Indo-European *h₁eh₂nos ‘ring’

Proto-Italic *ānos ‘ring’

Latin ānus ‘ring’

Latin ānulus ‘ring’

Latin ānulāris ‘ring-shaped’

Today it means

adj Between rings; especially between successive tree rings

Language periods are conventional ranges, not dates for this word.

Etymograph / interannular