collimate
verb
[ ˈkɒlɪmeɪt ]
• make (rays of light or particles) accurately parallel.
• "the caesium atoms are collimated into a narrow beam"
Origin:
mid 19th century: from Latin collimare, an erroneous reading (in some editions of Cicero) of collineare ‘align or aim’, from col- ‘together with’ + linea ‘line’.
