In Safari I can right click and in the context menu click look up and i get a pop up with this text and more
FDM may refer to:
Science and technology
- Fat in dry matter, a measurement of fat content for foods with varying moisture contents
- Finite difference method
- Free Download Manager, a full-featured download accelerator and manager
- Frequency-division multiplexing
- Fused deposition modeling, a technology used for rapid prototyping"
