- sperm head
- head of spermatozoon the oval anterior end of a spermatozoon, which contains the male pronucleus and is surrounded by the acrosome. See illustration at spermatozoon.
Medical dictionary. 2011.
sperm head
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Sperm whale — Sperm Whale[1] Size compared to an average human … Wikipedia
Sperm donation — is the provision (or ‘donation’) by a man, (known as a ‘sperm donor’), of his sperm, with the intention that it be used to impregnate a woman who is not usually the man s sexual partner, in order to produce a child. A sperm donor is the natural… … Wikipedia
Sperm heteromorphism — is the simultaneous production of two or more distinguishable types of sperm by a single male. The sperm types might differ in size, shape and/or chromosome complement. Sperm heteromorphism is also called sperm polymorphism or sperm dimorphism… … Wikipedia
Sperm whale — (Zo[ o]l.) A very large toothed whale ({Physeter macrocephalus}), having a head of enormous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case, filled with oil and… … The Collaborative International Dictionary of English
Sperm-whale porpoise — Sperm whale Sperm whale (Zo[ o]l.) A very large toothed whale ({Physeter macrocephalus}), having a head of enormous size. The upper jaw is destitute of teeth. In the upper part of the head, above the skull, there is a large cavity, or case,… … The Collaborative International Dictionary of English
Sperm — Sperm, n.[Contr. fr. spermaceti.] Spermaceti. [1913 Webster] {Sperm oil}, a fatty oil found as a liquid, with spermaceti, in the head cavities of the sperm whale. {Sperm whale}. (Zo[ o]l.) See in the Vocabulary. [1913 Webster] … The Collaborative International Dictionary of English
Sperm oil — Sperm Sperm, n.[Contr. fr. spermaceti.] Spermaceti. [1913 Webster] {Sperm oil}, a fatty oil found as a liquid, with spermaceti, in the head cavities of the sperm whale. {Sperm whale}. (Zo[ o]l.) See in the Vocabulary. [1913 Webster] … The Collaborative International Dictionary of English
Sperm whale — Sperm Sperm, n.[Contr. fr. spermaceti.] Spermaceti. [1913 Webster] {Sperm oil}, a fatty oil found as a liquid, with spermaceti, in the head cavities of the sperm whale. {Sperm whale}. (Zo[ o]l.) See in the Vocabulary. [1913 Webster] … The Collaborative International Dictionary of English
sperm whale — 1830, shortening of spermaceti whale (so called because the waxy substance in its head was mistaken for sperm), from spermaceti (1471), from M.L. sperma ceti sperm of a whale, from L. sperma (see SPERM (Cf. sperm)) + cetus large sea animal (see… … Etymology dictionary
sperm whale — sperm whales N COUNT A sperm whale is a large whale with a large head that has a section in it which contains oil … English dictionary
