Particle board is very dense, heavy, and flat. Particleboard-core plywood Plywood that is made by gluing a thin layer of veneer to a piece of particleboard. Phloem The inner part of a tree's bark that delivers water and other nutrients. Photosynthesis A process that plants use to synthesize nutrients from water and minerals using sunlight. Phylum A class or group of plants.
Phylum is a botanical term used by botanists to classify plants.
Pin Router A router that is fixed above a table with its bit point down. A pin in the table is aligned with the bit and used to route the workpiece. Pitch Pocket - A pocket of resinous sap confined within the grain of many conifers. Pith - The soft core in the center of a tree trunk. A method of sawing lumber where the log is cut tangential to the growth rings.