Is it a semiprime?

Brachylog, 2 bytes

Basically a port from Fatalize's answer to the Sphenic number challenge.

ḋĊ

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How?

ḋĊ - implicitly takes input
ḋ  - prime factorisation (with duplicates included)
 Ċ - is a couple

Husk, 4 bytes

_{Look ma no Unicode!}

=2Lp

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How?

=2Lp - a one input function
   p - prime factorisation (with duplicates included)
  L  - length
=2   - equals 2?

Pyth, 4 bytes

q2lP

Test suite.

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How?

q2lPQ     - Q is implicit input.

q2        - Is equal to 2?
    lPQ   - The length of the prime factors of the input.