Ni·sei (nē-sā, nēsā′)
n. pl. Nisei or Ni·seis
A person born to parents who emigrated from Japan.
[Japanese : ni, two, second (from Early Middle Chinese ᶮih; also the source of Mandarin èr) + sei, generation (from Middle Chinese ʂaj`; also the source of Mandarin shì (the Middle Chinese form ultimately being from Proto-Sino-Tibetan *lap, leaf, in reference to the renewal of foliage with each year)).]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.