Male

malesmasculineMale Only?MBoysmalenessMale sex
A male organism is the physiological sex that produces sperm.wikipedia
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Sex

biological sexsexesanatomical sex
A male organism is the physiological sex that produces sperm.
Organisms of many species are specialized into male and female varieties, each known as a sex.

Testosterone

low testosterone levels due to agingmetabolismprenatal exposure to androgens
Most male mammals, including male humans, have a Y chromosome, which codes for the production of larger amounts of testosterone to develop male reproductive organs.
Testosterone is the primary male sex hormone and an anabolic steroid.

Spermatozoon

spermatozoaspermsperm cells
Each spermatozoon can fuse with a larger female gamete, or ovum, in the process of fertilization.
In mammals, the sex of the offspring is determined by the sperm cell: a spermatozoon bearing a X chromosome will lead to a female (XX) offspring, while one bearing a Y chromosome will lead to a male (XY) offspring.

Female

femalesfeminine
Each spermatozoon can fuse with a larger female gamete, or ovum, in the process of fertilization. The repeated pattern is sexual reproduction in isogamous species with two or more mating types with gametes of identical form and behavior (but different at the molecular level) to anisogamous species with gametes of male and female types to oogamous species in which the female gamete is very much larger than the male and has no ability to move.
The ova are defined as the larger gametes in a heterogamous reproduction system, while the smaller, usually motile gamete, the spermatozoon, is produced by the male.

Sex-determination system

sex determinationsex determination systemsex chromosomes
Not all species share a common sex-determination system.
Some species (including humans) have a gene SRY on the Y chromosome that determines maleness.

Isogamy

conjugationisogamousSexual conjugation
The repeated pattern is sexual reproduction in isogamous species with two or more mating types with gametes of identical form and behavior (but different at the molecular level) to anisogamous species with gametes of male and female types to oogamous species in which the female gamete is very much larger than the male and has no ability to move.
Because both gametes look alike, they cannot be classified as "male" or "female".

Gamete

gametesgameticreproductive cells
The repeated pattern is sexual reproduction in isogamous species with two or more mating types with gametes of identical form and behavior (but different at the molecular level) to anisogamous species with gametes of male and female types to oogamous species in which the female gamete is very much larger than the male and has no ability to move.
In species that produce two morphologically distinct types of gametes, and in which each individual produces only one type, a female is any individual that produces the larger type of gamete—called an ovum— and a male produces the smaller tadpole-like type—called a sperm.

Planet symbols

Venus symbol
A male organism is the physiological sex that produces sperm. A common symbol used to represent the male sex is the Mars symbol ♂, a circle with an arrow pointing northeast.
The symbols of Venus and Mars are also used to represent female and male in biology and botany, following a convention introduced by Linnaeus in the 1750s.

Intersex

ambiguous genitaliaintersexualityintersex condition
It is also possible in a variety of species, including humans, to be XXY or have other intersex/hermaphroditic qualities, though one would still be considered genotypically (if not necessarily phenotypically) male so long as one has a Y-chromosome.
Intersex people are individuals born with any of several variations in sex characteristics including chromosomes, gonads, sex hormones, or genitals that, according to the UN Office of the High Commissioner for Human Rights, "do not fit the typical definitions for male or female bodies".

Gender symbol

Gender symbolsmale symbolfemale symbol
A common symbol used to represent the male sex is the Mars symbol ♂, a circle with an arrow pointing northeast.
The two standard sex symbols are the Mars symbol ♂ (often considered to represent a shield and spear) for male and Venus symbol ♀ (often considered to represent a bronze mirror with a handle) for female, derived from astrological symbols, denoting the classical planets Mars and Venus, respectively, and the elements iron and copper by alchemists.

Gonad

gonadsgonadalreproductive glands
The SRY activates Sox9, which forms feedforward loops with FGF9 and PGD2 in the gonads, allowing the levels of these genes to stay high enough in order to cause male development; for example, Fgf9 is responsible for development of the spermatic cords and the multiplication of Sertoli cells, both of which are crucial to male sexual development.
In the female of the species the reproductive cells are the egg cells, and in the male the reproductive cells are the sperm.

Reproduction

reproductiveprocreationreproduce
During reproduction, a male can give either an X sperm or a Y sperm, while a female can only give an X egg.
Parthenogenesis is the growth and development of embryo or seed without fertilization by a male.

Anisogamy

anisogamous
The repeated pattern is sexual reproduction in isogamous species with two or more mating types with gametes of identical form and behavior (but different at the molecular level) to anisogamous species with gametes of male and female types to oogamous species in which the female gamete is very much larger than the male and has no ability to move.
Gamete size difference is the fundamental difference between females and males.

Boy

boysBoyhoodits derogatory racial context
A boy is a young male human.

Bird

birdsAvesavian
The ZW sex-determination system, where males have a ZZ (as opposed to ZW) sex chromosome may be found in birds and some insects (mostly butterflies and moths) and other organisms.
Birds have two sexes: either female or male.

Male pregnancy

Lee Mingweia pregnant transsexualcarries the eggs
Male pregnancy is the incubation of one or more embryos or fetuses by male members of some species.

Man

menmanhoodmale
A man is an adult male human.

Masculinity

masculinemasculinitiesmanliness
It is distinct from the definition of the biological male sex, as both males and females can exhibit masculine traits.

Insect

Insectainsectsbugs
The ZW sex-determination system, where males have a ZZ (as opposed to ZW) sex chromosome may be found in birds and some insects (mostly butterflies and moths) and other organisms.
Some insects use parthenogenesis, a process in which the female can reproduce and give birth without having the eggs fertilized by a male.

Gender

gender issuessexgenders
For intersex people, who according to the UN Office of the High Commissioner for Human Rights, "do not fit typical binary notions of male or female bodies", access to any form of identification document with a gender marker may be an issue.

Organism

organismsflora and faunaliving organisms
A male organism is the physiological sex that produces sperm.

Physiology

physiologistphysiologicalphysiologically
A male organism is the physiological sex that produces sperm.

Sperm

sperm cellspermatiasperm cells
A male organism is the physiological sex that produces sperm.

Egg cell

ovumovaegg
Each spermatozoon can fuse with a larger female gamete, or ovum, in the process of fertilization.

Fertilisation

fertilizationconceptionfertilized
Each spermatozoon can fuse with a larger female gamete, or ovum, in the process of fertilization.