English
increment borer
From increment + borer.
A compound of increment + borer
Proto-Indo-European *ḱer- ‘to grow, become bigger’
…
Latin crēscō ‘grow’
Latin incrēscō ‘to grow in or upon’
Latin incrēmentum ‘growth, development, increase, augmentation’
Middle English encrement
English increment
Today it means
noun A tool with a handle and an auger bit, used to extract a section of tissue from a living tree with relatively minor injury to the plant.
Language periods are conventional ranges, not dates for this word.
Etymograph / increment borer