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blender_docs/manual/glossary/blender_terms.rst

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				Blender Terms
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				.. For writing style guide, see: :doc:`/about/contribute/style_guides/writing_guide`
				If you add new entries, keep the alphabetical sorting!

				.. glossary::

				Active
				One of the three :doc:`selection states </editors/3dview/object/selecting>`.
				Only one object or item can be active at any given time.

				Actuator
				A :term:`logic brick` that acts like a muscle of a lifeform. It can move the object, or make a sound.

				BU
				Blender Units
				Internal units used by Blender, equivalent to meters. Often abbreviated to "BU".

				Controller
				A :term:`logic brick` that acts like the brain of a lifeform.
				It makes decisions to activate muscles (:term:`actuators <actuator>`),
				using either simple logic or complex Python scripts.

				Sensor
				A :term:`logic brick` that acts like a sense of a lifeform.
				It reacts to touch, vision, collision etc.

				Logic brick
				A graphical representation of a functional unit in Blender's game logic.
				A Logic brick can be a :term:`Sensor`, :term:`Controller` or :term:`Actuator`.

				Particle system
				Technique that simulate certain kinds of fuzzy phenomena,
				which are otherwise very hard to reproduce with conventional rendering techniques.
				Common examples include fire, explosions, smoke, sparks, falling leaves, clouds, fog, snow, dust,
				meteor tails, stars and galaxies, or abstract visual effects like glowing trails, magic spells.
				Also used for things like: fur, grass or hair.

				Pose Mode
				Used for :term:`posing`, :term:`keyframing`, :term:`weight painting`,
				:term:`constraining <Constraint>` and :term:`parenting` the :term:`bones <Bone>` of an :term:`armature`.


				Objects
				=======

				.. glossary::

				Child
				An :term:`Object` that is affected by its :term:`Parent`.

				Constraint
				A way of controlling one :term:`object` with data from another.

				Crease
				Property of an :term:`edge`. Used to define the sharpness of edges in :term:`subdivision surface` meshes.

				Curve
				A type of object defined in terms of a line interpolated between Control Vertices.
				Available types of curves include :term:`Bézier` and :term:`NURBS`.

				Cyclic
				Often referring to an object being circular. This term is often associated with :term:`Curve`.

				Empty
				An :term:`Object` without any :term:`Vertices`, :term:`Edges <Edge>` or :term:`Faces <Face>`.

				Lattice
				A type of object consisting of a non-renderable three-dimensional grid of vertices.

				See also :doc:`Lattice Modifier </modeling/modifiers/deform/lattice>`.

				Layer
				A device for organizing objects. See also :doc:`Layers </editors/3dview/object/properties/relations/layers>`.

				Object
				Container for a type (Mesh, Curve, Surface, Metaball, Text, Armature,
				Lattice, Empty, Camera, Lamp) and basic 3D transform data (:term:`Object Origin`).

				Parent
				An :term:`Object` that affects its :term:`Child` objects.

				Parenting
				Creating a :term:`Parent`-:term:`Child` relationship between two :term:`objects <Object>`.

				Primitive
				A basic object that can be used as a basis for modeling more complicated objects.

				Vertex Group
				Collection of :term:`vertices <vertex>`.
				Vertex groups are useful for limiting operations to specific areas of a mesh.

				Weight Painting
				Assigning :term:`vertices` to :term:`Vertex Groups <Vertex Group>` with a weight of 0.0 - 1.0.