The Plummet or Plumb Bob or Triangle with Plumb Line is a classic symbol for the craft of architecture, because it is a tool to construct straight walls etc.
A pre-emoji proposal to Unicode in 2003, N2655 = L2/03-354, documented several symbols used in classic print dictionaries to identify fields for technical terms. Most have been added and many of them later became emojis, but Compasses #241, Spade #177 and Plummet did not.
The Plummet or Plumb Bob or Triangle with Plumb Line is a classic symbol for the craft of architecture, because it is a tool to construct straight walls etc.
A pre-emoji proposal to Unicode in 2003, N2655 = L2/03-354, documented several symbols used in classic print dictionaries to identify fields for technical terms. Most have been added and many of them later became emojis, but Compasses #241, Spade #177 and Plummet did not.