Concept:
In design, art, photography, and digital media, a thumbnail refers to a small-sized preview image that represents a larger image, page, or visual content. Thumbnails are commonly used in graphic design, web design, video platforms, galleries, and printing layouts to provide quick visual identification.
The question asks for the correct meaning of “thumbnail” in the context of design.
Step 1: Understanding the meaning of thumbnail in design.
A thumbnail is:
• A miniature visual preview
• A reduced-size image
• A quick representation of a larger design
• Used for planning layouts and compositions
Designers often sketch thumbnail layouts before creating final artwork.
Step 2: Analyzing Option (A) A form of Nail Art.
The word “thumbnail” may relate to a fingernail in ordinary language, but in design terminology it does not refer to nail art.
Therefore, Option (A) is incorrect.
Step 3: Analyzing Option (B) Thumb impression.
A thumb impression means the print made by a thumb, often used for identification purposes.
This meaning is unrelated to graphic or visual design terminology.
Hence, Option (B) is incorrect.
Step 4: Analyzing Option (C) Small image representation.
This option correctly describes a thumbnail.
A thumbnail:
• Represents a larger image
• Appears in reduced size
• Helps users preview content quickly
• Is widely used in websites, galleries, and design software
Thus, this option is completely correct.
Step 5: Analyzing Option (D) Small pictorial part.
Although this option sounds somewhat related, it is vague and incomplete. A thumbnail is not just a small part of a picture; rather, it is a reduced representation of the complete image or design.
Hence, Option (D) is incorrect.
Final Conclusion:
In design terminology, a thumbnail is a:
\[
\boxed{\text{Small image representation}}
\]
Therefore, the correct option is:
\[
\boxed{(3)}
\]