monophobia

Pronounced: mon-uh-FOE-bee-uh, noun

Notes: I almost didn’t use this one; I think it’s guessable

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Yesterday’s word

The word quantal means “of, relating to, or having only two experimental alternatives (such as dead or alive, all or none)”. It can also refer to something that relates to a quantum.

First usage

This word is relatively recent, coming about in the 1930s

Background / Comments

The word comes from Latin, from the word quanti, which is the plural of quantus (how much?). We also get the word “quantity” from the same root.