monogram
(obsolete) A picture drawn in line only, before the colour and/or shading is applied; an outline sketch.
(rare) A sentence consisting of only one line, or an epigram consisting of only one verse, of poetry.
A design or motif composed of one or more letters, often intertwined, used as an identifying mark of an individual or institution; the letters are usually the initials of their names.
To mark something with a monogram.
the unbroken line {{big|⚊}} for Heaven
the once-broken line {{big|⚋}} for Earth
the twice-broken line {{big|𝌀}} for Man (only used in Taixuanjing divination)