amnion. the innermost membrane enclosing the developing fetus and which is filled with amniotic fluid; characteristic of reptiles, birds and mammals. See also amniotic. amnion nodosum. a nodular condition of the fetal surface of the amnion, observed in oligohydramnios associated with absence of the kidneys in the fetus.
Clumsy Ninja is a hilariously funny game where you try to train a hapless would-be martial arts ninja. This is a free application for android phones. You can manipulate any part of this poor fellow's body with just a stroke of your finger. The idea is to train him to the point where he is a martial arts expert.
Full Definition of NINJA. : a person trained in ancient Japanese martial arts and employed especially for espionage and assassinations.See ninja defined for English-language learners.See ninja defined for kids.ADVERTISEMENT.efinition of NINJA for Kids. : a person trained in ancient Japanese martial arts who works as a spy and assassin especially in the past.