by-line

Noun by-line has 2 senses

• by-line(n = noun.communication) credit line - a line giving the name of the writer of a story or article;
has parts: author's name, writer's name
is a kind of line

• by-line(n = noun.act) avocation, hobby, pursuit, sideline, spare-time activity - an auxiliary activity;
is a kind of interest, pastime, pursuit
has particulars: spelaeology, speleology