Let's break down the question step-by-step: **Step 1: Understand the Question** - The question is asking about a special coating on touchscreens. - This coating is designed to repel oils deposited by fingertips. **Step 2: Recall Relevant Knowledge** - Many modern touchscreens have a coating that helps keep them clean by repelling oils and making it easier to wipe off fingerprints. - This type of coating is commonly known as an "**oleophobic coating**." **Step 3: Fill in the Blank** - The sentence should read: "Many touchscreens have a special coating designed to repel the oils deposited by fingertips called an (oleophobic) coating." **Final Answer:** > **oleophobic** **Explanation:** "Oleophobic" comes from "oleo-" meaning "oil" and "-phobic" meaning "fear" or "repelling." An oleophobic coating resists oils, making it easier to clean smudges from the screen.

Let's analyze the question carefully and provide a detailed step-by-step explanation. --- ### Step 1: Understand the context of the question The question involves a description of a special coating applied to touchscreens, which helps to repel certain substances deposited by fingertips. --- ### Step 2: Identify the key clues - The coating is **designed to repel oils** deposited by fingertips. - The phrase in the blank is: "Many touchscreens have a special coating designed to repel the oils deposited by fingertips called an ___ coating." ### Step 3: Recall relevant knowledge - Touchscreens are often coated with special materials to prevent fingerprints from smudging the screen. - These coatings are specifically designed to repel oils and make cleaning easier. - The term used for such coatings is **"oleophobic."** **Terminology explanation:** - **"Oleo-"**: relates to oils. - **"-phobic"**: means "fear of" or "resistance to." Thus, **"oleophobic"** literally means "oil-repelling." ### Step 4: Confirm the term fits the sentence - The blank should be filled with a word describing a coating that repels oils. - The sentence: *"Many touchscreens have a special coating designed to repel the oils deposited by fingertips called an **oleophobic** coating."* ### **Final Answer:** **oleophobic** --- ### **Summary:** The coating described is known as an **oleophobic coating**, which helps to repel fingerprint oils on touchscreens, keeping the screen cleaner and easier to wipe.