# #3d-printing-lexicon > 21 public memos tagged #3d-printing-lexicon on MythOS. ## Links - [Tag Page](https://mythos.one/tag/3d-printing-lexicon) - [MCP Server](https://mythos.one/api/mcp) ## Memos - [3D Printing Glossary](https://mythos.one/me/brianswichkow/ed75b0): The 3D Printing Glossary is a collection of terms used in 3D Printing, spanning the core processes, filament and resin materials, printer hardware, slicer settings, and common print defects that... - [Heated Bed](https://mythos.one/me/brianswichkow/9c553e): A heated bed is the temperature-controlled build platform of an FDM 3D printer that warms the print surface to improve first-layer adhesion and reduce warping as the plastic cools. The heated bed... - [Layer Height](https://mythos.one/me/brianswichkow/e0e4f8): Layer height is the vertical thickness of each individual layer a 3D printer deposits or cures, measured in microns or millimeters, and the primary setting governing the tradeoff between print... - [Warping (3D Printing)](https://mythos.one/me/brianswichkow/9104ea): Warping is a 3D-printing defect in which a part's corners and edges lift away from the build plate as the plastic cools and contracts unevenly, pulling the print out of shape. Warping is a common... - [Supports (3D Printing)](https://mythos.one/me/brianswichkow/949559): Supports are sacrificial structures a slicer generates beneath overhangs and bridges of a 3D print, temporarily holding up material that would otherwise sag or collapse, then removed after printing.... - [Extruder](https://mythos.one/me/brianswichkow/466b7a): The extruder is the motor-and-gear assembly of an FDM 3D printer that grips solid filament and pushes it into the hotend at a controlled rate, forming the machine's cold end. The extruder controls... - [STL](https://mythos.one/me/brianswichkow/c3c321): STL (STereoLithography) is a widely used 3D model file format that represents an object's surface as a mesh of triangular facets, serving as the standard input a slicer converts for 3D printing. The... - [Retraction](https://mythos.one/me/brianswichkow/9b9e0a): Retraction is a slicer command that briefly pulls filament back from the hot nozzle before a travel move, relieving pressure to prevent oozing and the fine strings it leaves across a 3D print.... - [PETG](https://mythos.one/me/brianswichkow/038887): PETG (polyethylene terephthalate glycol) is a glycol-modified polyester 3D printing filament that balances the easy printing of PLA with strength, toughness, and moisture and chemical resistance... - [Nozzle](https://mythos.one/me/brianswichkow/8dc16d): The nozzle is the small metal tip at the end of an FDM 3D printer's hotend, with a precise bore—commonly 0.4 mm—through which molten filament is extruded onto the build surface. The nozzle sets the... - [G-code](https://mythos.one/me/brianswichkow/389c45): G-code is a plain-text machine-control language — the sequence of movement, temperature, and extrusion commands a slicer generates from a 3D model to drive a printer's motors and components layer by... - [Slicer](https://mythos.one/me/brianswichkow/3412c7): Slicer software converts a 3D model into the layer-by-layer instructions a 3D printer follows, dividing the digital object into horizontal cross-sections and generating machine-readable G-code. A... - [Infill](https://mythos.one/me/brianswichkow/60d89d): Infill is the internal lattice a slicer generates inside a 3D-printed part, set as a density percentage from hollow to solid to balance strength, weight, material use, and print time. Infill is the... - [ABS (Acrylonitrile Butadiene Styrene)](https://mythos.one/me/brianswichkow/a9e407): ABS (acrylonitrile butadiene styrene) is a petroleum-based thermoplastic 3D printing filament valued for its toughness, impact resistance, and heat tolerance, but prone to warping without a heated... - [Selective Laser Sintering (SLS)](https://mythos.one/me/brianswichkow/3ec565): Selective Laser Sintering (SLS) is an additive manufacturing process that builds objects by using a high-power laser to fuse fine polymer powder, layer by layer, into solid parts. Selective Laser... - [Hotend](https://mythos.one/me/brianswichkow/13c4ef): The hotend is the heated assembly of an FDM 3D printer that melts thermoplastic filament and forces it through a nozzle, comprising a heater block, heat break, heat sink, and nozzle. In fused... - [PLA (Polylactic Acid)](https://mythos.one/me/brianswichkow/025e51): PLA (polylactic acid) is a plant-derived, biodegradable thermoplastic and the most widely used 3D printing filament, prized for low-temperature printing, minimal warping, and beginner-friendly... - [Photopolymer Resin](https://mythos.one/me/brianswichkow/da29df): Photopolymer resin is a liquid, UV-curable material — typically acrylic or epoxy monomers combined with photoinitiators — that solidifies layer by layer under ultraviolet light in SLA, DLP, and other... - [Stereolithography (SLA)](https://mythos.one/me/brianswichkow/ddabd0): Stereolithography (SLA) is an additive manufacturing process that builds objects by using an ultraviolet laser to selectively cure and harden liquid photopolymer resin one thin layer at a time.... - [Fused Deposition Modeling (FDM)](https://mythos.one/me/brianswichkow/84b479): Fused Deposition Modeling (FDM) is an additive manufacturing process that builds objects layer by layer by heating thermoplastic filament and extruding it through a moving nozzle onto a build... - [TPU (Thermoplastic Polyurethane)](https://mythos.one/me/brianswichkow/21514a): TPU (thermoplastic polyurethane) is a flexible, rubber-like 3D printing filament rated on the Shore hardness scale, prized for elasticity, abrasion resistance, and impact absorption in functional...