runt

Etymology

The OED classifies this word as "of obscure origin". Some see a connection to Middle Dutch runt (“ox”), but the OED considers this to be unlikely.

noun

1. The smallest animal of a litter.
   Sometimes, as we have seen, one member of a litter is a runt, much smaller than the rest. He is unable to fight for food as strongly as the rest, and runts often die. We have considered the conditions under which it would actually pay a mother to let a runt die. 1976, Richard Dawkins, The Selfish Gene, Kindle edition, OUP Oxford, published 2016, page 168
2. (by extension) The smallest child in the family.
   the runt of the family
3. Undersized or stunted plant, animal or person.
4. (slang) An uninfluential or unimportant person; a nobody.
5. (networking) An Ethernet packet that does not meet the medium's minimum packet size of 64 bytes.
6. (typography) A single word (or portion of a hyphenated word) that appears as the last line of a paragraph.
7. A breed of pigeon related to the carrier pigeon.
8. (obsolete, UK, dialect) A hardened stem or stalk of a plant.
9. A bow.