What's the difference between reinless and veinless?

Reinless

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Definition:

• (a.) Not having, or not governed by, reins; hence, not checked or restrained.

Example Sentences:

Veinless

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Definition:

• (a.) Having no veins; as, a veinless leaf.

Example Sentences:

• (1) EHB is located on chromosome 5, 34.0 map units from to2 (topaz2 eyes) and 7.2 map units from mv (M1-veinless).