*Embryology. The study of the development of the embryo.
Ethics. The science of human duty; the body of rules of duty drawn from this science; a particular system of principles and rules concerning duty, whether true or false; rules of practice in respect to a single class of human actions; as political or social ethics.
*Fauna. The totality of the animals naturally inhabiting a certain country or region, or which have lived during a given geological period.
Fetichism, Feticism. One of the lowest and grossest forms of superstition, consisting in the worship of some material object, as a stone, a tree, or an animal, often casually selected; practiced among tribes of lowest mental endowment, as certain races of negroes.
*Flora. The totality of the plants growing naturally in a country or during a given geological period.
*Fœtal. Of or belonging to the fœtus, or embryo in course of development.
Fœtus, same as Fetus. The young of viviparous animals in the womb, and of oviparous animals in the egg, after it is perfectly formed, before which time it is called embryo.
*Ganoid Fishes. Fishes covered with peculiar enameled bony scales. Most of them are extinct.
Genus (Science). An assemblage of species possessing certain characters in common, by which they are distinguished from all others. It is subordinate to tribe and sub-tribe; hence, a single species having distinctive characters that seem of more than specific value may constitute a genus.