n. 标记, 简写, 速记用略字

[ noun ]
a single written symbol that represents an entire word or phrase without indicating its pronunciation
<noun.communication>
7 is a logogram that is pronounced `seven' in English and `nanatsu' in Japanese

Logogram \Log"o*gram\, n. [Gr. lo`gos word + -gram.]
A word letter; a phonogram, that, for the sake of brevity,
represents a word; as, |, i. e., t, for it. Cf.
{Grammalogue}.