deuter-

Deuter- is a combining form used like a prefix meaning “second.” It is used in some scientific and other technical terms.

In terms from chemistry, deuter- specifically refers to deuterium, an isotope of hydrogen that has twice the mass of ordinary hydrogen. Deuterium was based directly on the Greek ���ú�ٱ���Dz�.

Deuter- comes from the Greek ���ú�ٱ���Dz�, meaning “second.”

Deuter- is a variant of deutero-, which loses its -o– when combined with words or word elements beginning with vowels.

Want to know more? Read our Words That Use deutero- article.

Other variants of deutero- are deuto- and deut-.

One example of a term that features the combining form deuter- is deuteragonist, “the actor next in importance to the protagonist” in ancient Greek theater.

The deuter- part of the word means “second.” If protagonist has a literal sense of “first actor” (like a main character), then a deuteragonist literally means? That’s right, “second actor.” Today, we know a deuteragonist as a supporting actor.

The word comes from the Greek ���ܳٱ������ō�Ծ�����ḗs, which uses the equivalent form of deuter- in the language.

������ are some words that use or are related to the combining form deuter-?

• deuteranomaly
• deuteranopia (using the equivalent form of the word in New Latin)
• deuterate
• deuteride
• deuterium oxide
• deuteron

������ are some other forms that deuter- may be commonly confused with?

• di-
• dermato-
• dodeca-
• duo-
• neutro-

Anopia means “blindness,” especially due to a structural defect in or absence of an eye. Deuteranopia is a vision defect where the retina does not respond to the color green, green being regarded as the second component of color vision. ������ does deuteranopia literally translate to?