From The Camel (Programming Perl (Third edition): section 3.16. Conditional Operator):

As in C, ?: is the only trinary operator.

The Camel also comments in the introduction to Chapter 3:

Perl operators come in three arities: unary, binary, and trinary (or ternary, if your native tongue is Shibboleth).

Update: in light of some later replies to the OP perhaps I should note that as Perl has only one terniary/trinary operator, and given The Camel's use of 'trinary', it is reasonable in the context of Perl to refer to the conditional operator ?: as 'the trinary operator'. This may not be "correct" in a wider sense, but is certinally fitting in a Perl context. :)

DWIM is Perl's answer to Gödel

In reply to Re: Ternary operator (there's no Trinary operator ) by GrandFather
in thread Ternary operator (there's no Trinary operator ) by davido

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