avai - bark
- availability index
- availability of element
- available alkali
- available capacit
- available fuel
- available inventor
- available inventory
- available moisture
- available nitrogen
- available phosphorus
- available water
- available-total rate
- available-total ratio
- avalanche track
- avalanche transportation
- avec carriage
- average age of stand
- average annual precipitation
- average annual stand depletion
- average beetle population
- average chemical pulp sample
- average girth
- average groundwood pulp sample
- average logs to a turn
- average number of trees per acre
- average number of trees per load
- average survival
- average total wood costs
- average tree height
- average tree of the stand
- average volume per tree
- avicennietum
- avoirdupois weights
- awi-shaped
- awi-shaped needles
- awkward
- awkward duct angle
- awl-leaved
- ax back
- ax blade
