The noun NINJA has 2 senses: 1. a member of the ninja who were trained in martial arts and hired for espionage or sabotage or assassinations; a person skilled in ninjutsu. 2. a class of 14th century Japanese who were trained in martial arts and were hired for espionage and assassinations.
zygoma (zÄ«gÅÂ´mÉ), n 1. a long, slender process of the temporal bone, arising from the lower part of the squamous portion of the temporal bone and passing forward horizontally to join with the malar or zygomatic bone. 2. the zygomatic or malar bone that forms the prominence of the cheek.
A zygote is a eukaryotic cell formed by a fertilization event between two gametes. The zygote's genome is a combination of the DNA in each gamete, and contains all of the genetic information necessary to form a new individual. In multicellular organisms, the zygote is the earliest developmental stage. In single-celled organisms, the zygote can divide asexually by mitosis to produce identical offspring. Oscar Hertwig and Richard Hertwig made some of the first discoveries on animal zygote formatio