Do you understand the meaning?

Adjustment layers
Offer you the ability to make an adjustment and then go back at any time and modify the adjustment. They are also a record of the adjustments you have made.
Bounding box
Selection area surrounding the image that you are working on in Photoshop.
Drop Shadow
Used to add the illusion of depth to an illustration.
Interpolation
Creates new pixels based on the data of the original pixels.
Invert command
Useful way to quickly toggle between a white and a black layer mask.
Layer masks
Essential to working with layers; they allow you to choose which areas of the layer are visible and which areas are not visible.
Lock icon
When cursor is positioned over this icon, a tool tip will appear to explain which portion of the layer is locked.
Puppet Warp
A transform command that allows you to modify targeted artwork by creating a mesh over the artwork, and then specifying areas that you want to transform and areas that you want to remain unaffected.
Stroke layer style
Used to outline images or to set the artwork apart and make it more vibrant in the overall composition of the graphic on an entire layer.
Transparent pixels
Represented by a gray-and-white checkerboard pattern, they are the non-artwork portion of any layer.
Chisel Hard Emboss
Layer style that creates a chiseled effect with a hard edge.
Gradient Overlay
Creates subtle movement in artwork by shifting from one color to other colors in a single layer, which is covered by other layers.
Pillow Emboss
A multi-faceted layer style that can be used to add soft-edged dimension to artwork.
Smooth Emboss
Presents a softer beveled edge on artwork than the Chisel Hard Emboss option.
Stamp Visible Layer
Copies the entire canvas in its current visual status, then creates a new layer with the artwork flattened onto one layer.
Grayscale mode
Mode in which each pixel in a selected image can be one of 256 shades of gray.
Histogram
A visual reference of every pixel in the selection.
Posterize
Feature that allows you to choose the number of pixel color choices used in your composition.
Curves adjustment
A color manipulation utility in Photoshop, that is the most comprehensive and powerful option for manipulating color. Its power is based on the precision that it offers to adjust up to 14 different points throughout the images tonal range.
Highlight point
The whitest area of the image. (White point)
Highlights
Light gray areas of the image.
Midtones
The gray areas between white and black points.
Primary colors of light
Red, Green, and Blue or RGB colors.
Selective Color adjustment
Allows you to make adjustments based on specific colors.
Shadow point
The blackest area of the image. (Black point)
Shadows
The dark gray areas of the image.
Chiseled type
Type that can be used for metallic, stone, and wood textures. It connotes hardness, yet it also connotes elegance.
Eroded type
Type with rough edges.
Plastic type
Type that is unusual, dramatic, fun, playful, and eye-catching. Looks like it was created by pouring a liquid into a mold and letting it harden.
Plastic Wrap Filter
Filter that has different effects on different selections. It makes an uneven melted effect possible.
Recessed type
Another way to make type look three-dimensional by pushing things in, back, or away.