-dromous

The combining form -dromous is used like a suffix meaning “of or related to running,” “course,” or “racecourse.” It is occasionally used in technical and scientific terms, especially in biology.

The form -dromous comes from a combination of two forms, -drome and -ous. The combining form -drome comes from Greek ���ó���Dz�, meaning “a running, course, place for running.” The suffix -ous comes from Latin -ō���ܲ�, meaning “full of” or “like.”

A technical term that uses the form -dromous is heterodromous, “moving in the opposite direction.”

The form hetero- means “different” or “other,” from Greek ��é�ٱ���Dz�. The -dromous portion of the word means “of or related to running.” Heterodromous translates to “of or related to running in different (directions).”

������ are some words that use the combining form -dromous?

• anadromous (using the equivalent form of -dromous in Greek)
• catadromous
• diadromous

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

• -dom
• -ferous
• -ous
• -rama

The combining form cata- means “down,” “against,” or “back.” With this in mind, what does catadromous literally mean?