Therian Symbol Copy and Paste

Copy ΘΔ, the theta-delta, as plain capitals, small letters or one of five maths styles.

ΘΔTheta-deltaU+0398 U+0394Ready to copy

15 rows. Tap any value to copy it.

15 rows. A character and its name both copy the character. A code copies the code.
Character	Name	Code point	Alt code	Option keys	HTML	LaTeX
	Made of U+0398 and U+0394: Greek capital letter theta, then Greek capital letter delta. Together they are the theta-delta. Unicode has no single character for the sign, so it is two letters.
	Made of U+03B8 and U+03B4: the two small letters, for a quieter line.
	Made of U+1D6AF and U+1D6AB: Mathematical bold capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
	Made of U+1D6E9 and U+1D6E5: Mathematical italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
	Made of U+1D723 and U+1D71F: Mathematical bold italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
	Made of U+1D75D and U+1D759: Mathematical sans-serif bold capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
	Made of U+1D797 and U+1D793: Mathematical sans-serif bold italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
	U+0398. The first half of the sign. Alt+233 types it, a leftover of code page 437. Θ in HTML, \Theta in LaTeX.
	U+0394. The second half. It has no Alt code: Alt+235 types the small δ. Δ in HTML, \Delta in LaTeX.
	U+03B8. The small theta. It has no Alt code. θ in HTML, \theta in LaTeX.
	U+03B4. The small delta. Alt+235 on a number pad. δ in HTML, \delta in LaTeX.
	U+2206. A look-alike: a maths sign, not the Greek letter. Option+J types it, so a pair typed that way ends in a different character from Δ.
	U+03F4. A look-alike: a second capital theta that Unicode keeps for formulas and defines as a compatibility form of Θ. Added in Unicode 3.1.
	U+2296. A look-alike: a minus sign in a circle, a maths operator. &ominus; in HTML, \ominus in LaTeX.
	U+25B3. A look-alike: a triangle, not a letter. \bigtriangleup in LaTeX.

Next step Your own words in Greek letters Δ, δ and ∆, told apart

How it works

The therian symbol is the theta-delta: the Greek capitals theta and delta written together, ΘΔ. Unicode has no single character for it, so each row is two letters. Below them are the letters alone with their codes, and four look-alikes.

Read the full guide

Two letters, no character of its own

The theta-delta is a capital theta and a capital delta combined, and it has been a symbol of therianthropy since 2003. Unicode encodes letters, not emblems, so the pair here is U+0398 followed by U+0394. It pastes wherever Greek letters do and takes the size of the words round it.

The five styled pairs

Unicode has five sets of styled Greek capitals, all meant for formulas: bold, italic, bold italic, sans-serif bold and sans-serif bold italic. They arrived in Unicode 3.1. A pair in one of them keeps its style without any formatting.

A search for ΘΔ misses Θ∆. The second pair ends in Increment, U+2206, a maths sign that only looks like the letter.
In HTML the pair is ΘΔ. In LaTeX it is \Theta\Delta, in maths mode, with no package.

Questions and answers

What is the therian symbol?

The theta-delta: the capital Greek letters theta and delta, combined. In text it is written ΘΔ. It has stood for therianthropy since 2003.

How do I type the theta-delta on a keyboard?

With Num Lock on, hold Alt and type 233 on the number pad for Θ. The capital Δ has no Alt code: Alt+235 types the small δ, and Option+J types ∆, which is not the letter. Δ is pasted, or typed on a Greek layout.

Is there a theta-delta emoji?

No. No emoji name or search word in Emoji 18.0 mentions theta or the sign. ΘΔ is two ordinary letters, not an emoji, so it takes the size of the text round it.

Why do the bold and italic pairs show as boxes?

They are mathematical letters from a block that needs its own font. A device without one draws an empty box for each letter. The plain ΘΔ and θδ use the ordinary Greek letters, which almost every font has.

All 15 rows

The theta-delta 7

Theta-delta Made of U+0398 and U+0394: Greek capital letter theta, then Greek capital letter delta. Together they are the theta-delta. Unicode has no single character for the sign, so it is two letters.
Theta-delta, bold Made of U+1D6AF and U+1D6AB: Mathematical bold capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
Theta-delta, bold italic Made of U+1D723 and U+1D71F: Mathematical bold italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
Theta-delta, italic Made of U+1D6E9 and U+1D6E5: Mathematical italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
Theta-delta, sans-serif bold Made of U+1D75D and U+1D759: Mathematical sans-serif bold capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
Theta-delta, sans-serif bold italic Made of U+1D797 and U+1D793: Mathematical sans-serif bold italic capital theta and delta. Letters meant for formulas, so a device without a maths font draws two empty boxes.
Theta-delta, small letters Made of U+03B8 and U+03B4: the two small letters, for a quieter line.

Show all 15 rows (8 more)

The two letters and their codes 4

Greek capital letter delta U+0394. The second half. It has no Alt code: Alt+235 types the small δ. Δ in HTML, \Delta in LaTeX.
Greek capital letter theta U+0398. The first half of the sign. Alt+233 types it, a leftover of code page 437. Θ in HTML, \Theta in LaTeX.
Greek small letter delta U+03B4. The small delta. Alt+235 on a number pad. δ in HTML, \delta in LaTeX.
Greek small letter theta U+03B8. The small theta. It has no Alt code. θ in HTML, \theta in LaTeX.

Look-alikes, not the letters 4

Circled minus U+2296. A look-alike: a minus sign in a circle, a maths operator. &ominus; in HTML, \ominus in LaTeX.
Greek capital theta symbol U+03F4. A look-alike: a second capital theta that Unicode keeps for formulas and defines as a compatibility form of Θ. Added in Unicode 3.1.
Increment U+2206. A look-alike: a maths sign, not the Greek letter. Option+J types it, so a pair typed that way ends in a different character from Δ.
White up-pointing triangle U+25B3. A look-alike: a triangle, not a letter. \bigtriangleup in LaTeX.

How this list was compiled: Names, and the code points they belong to, are checked against UnicodeData.txt, version 18.0.0 (https://www.unicode.org/Public/18.0.0/ucd/UnicodeData.txt), and printed in sentence case; the version a character was added in is from DerivedAge.txt (https://www.unicode.org/Public/18.0.0/ucd/DerivedAge.txt). It is checked that no character and no emoji is named for the sign, and that Unicode has exactly five styled mathematical alphabets with a capital theta. Alt codes, the Option key, HTML entities and LaTeX macros come from this family's lookup of typing methods, built from the HTML standard's entity list, the LaTeX sources and the code page tables. That the theta-delta is a combination of the capital Greek letters theta and delta, and has been a symbol of therianthropy since 2003, is from https://en.wikipedia.org/wiki/Therian_subculture (the caption and description of its lead image, wikitext read 2026-09-30); nothing else about the sign is stated. Licence: own work (facts from the Unicode Character Database, Unicode License v3, and from Wikipedia, CC BY-SA 4.0, restated in this site's own words; aliases and notes marked as Unicode's are quoted from NamesList.txt, Copyright © 1991-2026 Unicode, Inc., https://www.unicode.org/license.txt)