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Spermatozoon :: Spermatozoon (n.) Same as Spermatozoid.

Polyspermy :: Polyspermy (n.) Fullness of sperm, or seed; the passage of more than one spermatozoon into the vitellus in the impregnation of the ovum..

Zoonic :: Zoonic (a.) Of or pertaining to animals; obtained from animal substances.

Epizoon :: Epizoon (n.) One of the artificial group of invertebrates of various kinds, which live parasitically upon the exterior of other animals; an ectozoon. Among them are the lice, ticks, many acari, the lerneans, or fish lice, and other crustaceans..

Eozoic :: Eozoic (a.) Of or pertaining to rocks or strata older than the Paleozoic, in many of which the eozoon has been found..

Metazoon :: Metazoon (n.) One of the Metazoa.

Entozoon :: Entozoon (n.) One of the Entozoa.

Zoonite :: Zoonite (n.) One of the segments of the body of an articulate animal.

Haematozoon :: Haematozoon (n.) Certain species of nematodes of the genus Filaria, sometimes found in the blood of man, the horse, the dog, etc..

Zoon :: Zoon (n.) An animal which is the sole product of a single egg; -- opposed to zooid.

Zoonomy :: Zoonomy (n.) The laws of animal life, or the science which treats of the phenomena of animal life, their causes and relations..

Eozoons :: Eozoons (pl. ) of Eozoo.

Hydrozoons :: Hydrozoons (pl. ) of Hydrozoo.

Zoonule :: Zoonule (n.) Same as Zoonite.

Protozoonite :: Protozoonite (n.) One of the primary, or first-formed, segments of an embryonic arthropod..

Actinozoon :: Actinozoon (n.) One of the Actinozoa.

Worm :: Worm (n.) Any helminth; an entozoon.

Acephalocyst :: Acephalocyst (n.) A larval entozoon in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin..

Spermatozoid :: Spermatozoid (n.) The male germ cell in animals and plants, the essential element in fertilization; a microscopic animalcule-like particle, usually provided with one or more cilia by which it is capable of active motion. In animals, the familiar type is that of a small, more or less ovoid head, with a delicate threadlike cilium, or tail. Called also spermatozoon. In plants the more usual term is antherozoid..

Protozoon :: Protozoon (n.) A single zooid of a compound protozoan.

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