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.
Bit A router bit fitted with a bearing above the cutter which rides on the edge of a board or template keeping the bit a fixed distance from the edge. 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. A pocket of resinous sap confined within the grain of many conifers. The soft core in the center of a tree trunk.