Big gun and T-square

Big gun noun - One of high position or importance within a group.

T-square and big gun are semantically related. In some cases you can use "T-square" instead a noun phrase "Big gun".

T-square noun - A square used by draftsmen to draw parallel lines.

Big gun and T-square are semantically related. Sometimes you can use "Big gun" instead a noun phrase "T-square".