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Phlogiston
Phlogiston A hypothetical substance which, prior to the discovery of oxygen, was thought to produce fire.
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Oxygen
A chemical element essential for sustaining life.
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Phalangeal
Pertaining to any bone of the phalanges, that is the fingers or toes.
Phalloplasty
In plastic surgery, the procedures for attempted construction or reconstruction of a penis in cases of birth defect, of female-to-male transexualism, and of accidental or surgical amputation of the penis.
Phallus
A synonym for penis, which is also used to refer to the enlarged clitoris or penis-like structure of a female hermaphrodite.
Pheromone
An odorous substance or smell secreted by an organism that acts as a chemical messenger between members of the same or different species and serves as a foe repellent, territorial boundary or path marker, social heriarchy position indicator, child-parent bonding agent, or sexual lover/lover mate attractant. Pheromones may also regulate the reproductive ecology within a given species; an odoriferous substance that acts as a chemical messenger between individuals. By contrast, a hormone acts as a chemical messenger within the bloodstream of a single individual. In mammals, pheromones serve as foe repellents, boundary markers, child-parent attractants, and sex attractants.
Phimosis
Constriction of the foreskin so that it does not pull back, retracted over the glans of the penis
Phlogiston
Phocomelia
A birth defect of a limb, likened in everyday speech to a seal flipper, the hand or foot being attached to the trunk of the body by a single, small, deformed bone without, respectively, an elbow or knee.
Phyletic
Of or pertaining to a race. Phyletic components or aspects of behavior in human beings are those shared by all members of the human race, as compared with behavior that is individual and biographically or ontogenetically idiosyncratic. Phyletic behavior is the product of both prenatal and postnatal determinants, as is personal biographic behavior. Each is the end product of both innate and experiential determinants.
Phylism
A coined term used to refer to an element or unit of response or behavior of an organism that belongs to an individual through its phylogenetic heritage as a member of its species .
Phylogenetic
Belonging to the developmental history of an animal or vegetable species, which is the genealogical history shared by all members of the species.
Phylogeny
In biology, the developmental history of a species, which is the genealogical history shared by all members of the species.
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