Dot Symbols Guide — Punctuation Marks, Unicode & Input Tutorial

Dot symbols are punctuation marks used in writing and math to indicate pauses, separation, listing, or specific operations. Often appearing as dots, they play a key role in organizing sentence structure and clarifying logical relationships. This page catalogs all major dot symbols—periods, commas, enumeration commas, colons, semicolons, middle dots, bullets, and math dot operators—with detailed descriptions of each symbol's use, Unicode, LaTeX commands, and HTML entities for quick reference in academic writing, coding, and typography design.

🔤 1. Basic Punctuation (Period, Comma, Enumeration Comma, Semicolon, Colon)

。 is the Chinese period, used to end declarative sentences in Chinese text. It occupies a full-width character space and appears as a hollow circle. Unicode: U+3002; LaTeX: \text{。} (requires CJK support); HTML: 。. Unlike the English period, it cannot be used for abbreviations or decimal points—always distinguish fullwidth and halfwidth forms.

. is the English period (full stop), used to end sentences, mark abbreviations (e.g., Mr.), and serve as a decimal point. Unicode: U+002E; LaTeX: .; HTML: .. In programming, it accesses methods/properties (obj.method()). In regex, it matches any character except newline.

， is the Chinese comma, a fullwidth mark used for general pauses within Chinese sentences or separating parallel elements. Unicode: U+FF0C; HTML: ，. It should not be mixed with the English comma in English typography.

, is the English comma, a halfwidth mark for separating list items, clauses, or thousands. Unicode: U+002C; LaTeX: ,; HTML: ,. In CSV files it's the default delimiter. Typically followed by a space in English text.

、 is the enumeration comma, unique to Chinese, used to separate parallel words or short phrases with a brief pause. Unicode: U+3001; HTML: 、. It should not separate clauses—use the regular comma for those.

； is the Chinese semicolon, a fullwidth mark separating parallel compound sentences or multi-level lists. Unicode: U+FF1B; HTML: ；.

; is the English semicolon, connecting closely related independent clauses or separating complex list items. Unicode: U+003B; LaTeX: ;; HTML: &#59;. In C/Java it ends statements.

： is the Chinese colon, a fullwidth mark introducing explanations, lists, or quotations. Unicode: U+FF1A; HTML: ：.

: is the English colon, used before lists, explanations, or time (10:30). Unicode: U+003A; LaTeX: :; HTML: :. In Python and JSON, it separates keys from values.

📏 2. Special Spacing & Decorative Dots (Middle Dot, Ellipsis, Bullet)

· is the middle dot (interpunct), used in foreign names (e.g., Carl·Marx) or to join parallel terms. Unicode: U+00B7; LaTeX: \cdot or \textperiodcentered; HTML: ·. In math, \cdot denotes dot product.

‧ is the hyphenation point, similar to the middle dot but used in dictionaries or phonetic notation for syllable separation. Unicode: U+2027; HTML: ‧.

… is the ellipsis, three dots indicating omission, hesitation, or trailing off. Unicode: U+2026; LaTeX: \dots or \ldots; HTML: …. In Chinese, it's centered and takes two character widths; in English it's baseline-aligned.

• is the bullet, the standard unordered list marker. Unicode: U+2022; LaTeX: \textbullet; HTML: &bull;. Used in HTML <ul>, Word, and PowerPoint as the default list bullet.

‧ is the hyphenation point, similar to the middle dot but used in dictionaries or phonetic notation for syllable separation. Unicode: U+2027; HTML: &#8231;.

📐 3. Math Dot Operators (Dot Product, Bullet, Raised/Lowered Dots)

⋅ is the dot operator, the standard symbol for multiplication or inner product in math. Unicode: U+22C5; LaTeX: \cdot; HTML: &sdot;. In vector math, a ⋅ b yields a scalar.

∙ is the bullet operator, often used for derivative notation (e.g., ẋ in Newton's notation). Unicode: U+2219; LaTeX: \dot{}; HTML: &#8729;.

․ is the one dot leader, a raised dot used as a separator or decimal variant in some European typography. Unicode: U+2024; HTML: &#8232;.

‥ is the two dot leader, two consecutive raised dots for omission or table-of-contents leaders. Unicode: U+2025; HTML: &#8229;.

💡 4. Other Special Dots (Fullwidth Period, Fullwidth Marks)

． is the fullwidth period, occupying one Chinese character width for alignment in Chinese text. Unicode: U+FF0E; HTML: &#65294;.

、 is the enumeration comma, covered above. Its core role is separating parallel words like "apple、banana、orange".

， is the Chinese comma, one of the most frequent marks in Chinese writing. Proper input and display ensure document standardization.

💡 5. Dot Symbol Usage Summary

1. Strictly distinguish Chinese and English dots: Chinese marks (，。；：、) are fullwidth, taking two English character widths with stronger pauses; English marks (,.;:) are halfwidth. Mixing them causes layout errors and ambiguity—always switch input mode accordingly.

2. Precise math dot operators: In LaTeX math mode, use \cdot (⋅) for multiplication, \dots/\cdots for ellipsis, and \textperiodcentered for middle dots. Never substitute the English period for dot product—this is considered an error in academic typesetting.

3. Bullets and list standards: Use • (bullet) for unordered lists—it's semantically clear and cross-platform compatible. In web design, list-style-type can change it to circles, squares, etc. In plain text, asterisk * or hyphen - are common substitutes.

4. Correct ellipsis input: Use the dedicated ellipsis character … (U+2026) rather than three periods for professional typography and searchability. In Chinese it's centered and two characters wide; in English it's baseline-aligned. LaTeX's \dots auto-adapts to context.