2. Initialism. Traffic Signal Box ¹
¹ Source: wiktionary.com
Lexicographical Neighbors of Tsb
TRIC TRIC agents TRIGA TRIPS TRIS TRM TRO TROWAL TRS TRS connector | TRS connectors TRT TRV TSA TSB TSCA TSE TSH TSH-RF TSH releasing factor | TSI TSN TSO TSP TSR TSRA TSS TST TSTA |