Definition of PLACOID. : of, relating to, or being a scale of dermal origin with an enamel-tipped spine characteristic of the elasmobranchs. ADVERTISEMENT.Greek plak-, plax flat surface.First Known Use: 1842.efinition of PLACOID. : of, relating to, or being a scale of dermal origin with an enamel-tipped spine characteristic of the elasmobranchs. ADVERTISEMENT. Greek plak-, plax flat surface. First Known Use: 1842.
A tree pruner is a class 1 lever. The fulcrum is where the two blades cross, and the load is what you are cutting. The effort is applied to the two handles.
Select pruning equipment. There are a variety of pruning tools that can be used to trim your palm tree. Consider the size of your tree to determine which tool you need. A serrated knife can be used to cut off fronds that are less than 1 inch in diameter. A knife is also useful for removing flower stalks from the tree.