A button (blood type) Emoji

The A button (blood type) emoji is a symbolic or functional icon — used for signaling, labeling, warnings, or abstract concepts (like direction, currency, or math) rather than depicting a literal object, person, or place.

Category context: The Symbols category gathers abstract icons — arrows, math notation, currency, warning signs, and keycap numbers — that function similarly to the Miscellaneous Symbols and Dingbats Unicode blocks, but rendered in full emoji color style rather than plain text glyphs.

Cataloged under Alphanum within the Symbols category, A button (blood type) is the 1st of 224 emoji How To Type Any Symbol lists in this category, and was introduced in Emoji version 0.6 of the Unicode Emoji Standard. Technically, it is represented by a single Unicode code point rather than a combined sequence, making it one of the simpler emoji to encode and display reliably across platforms. Its Unicode code point sequence is U+1F170.

💡 Good to know: Warning and prohibition symbol emoji carry real informal safety/caution connotations in casual use — useful for flagging important messages, but not a substitute for proper safety signage in professional or safety-critical contexts.