The wood which is suitable for engineering purposes or construction is called timber. The word timber is derived from an old English word ‘timbrian’, which means ‘to build’.
Defects In Timber
Timber develops many growth characteristics during or after milling. These may be considered defects in timber if they are undesirable visual attributes or structurally affect the timber.
A small mark on timber may not affect it structurally but will render the piece unusable for joinery.