Pre-generation

noun
1.
the entire body of individuals born and living at about the same time:
the postwar generation.
2.
the term of years, roughly 30 among human beings, accepted as the average period between the birth of parents and the birth of their offspring.
3.
a group of individuals, most of whom are the same approximate age, having similar ideas, problems, attitudes, etc.
Compare Beat Generation, Lost Generation.
4.
a group of individuals belonging to a specific category at the same time:
Chaplin belonged to the generation of silent-screen stars.
5.
a single step in natural descent, as of human beings, animals, or plants.
6.
a form, type, class, etc., of objects existing at the same time and having many similarities or developed from a common model or ancestor (often used in combination): a new generation of anticancer drugs;
a third-generation phone.
7.
the offspring of a certain parent or couple, considered as a step in natural descent.
8.
the act or process of generating; procreation.
9.
the state of being generated.
10.
production by natural or artificial processes; evolution, as of heat or sound.
11.
Biology.

one complete life cycle.
one of the alternate phases that complete a life cycle having more than one phase:
the gametophyte generation.

12.
Mathematics. the production of a geometrical figure by the motion of another figure.
13.
Physics. one of the successive sets of nuclei produced in a chain reaction.
14.
(in duplicating processes, as photocopying, film, etc.) the distance in duplicating steps that a copy is from the original work.
noun
1.
the act or process of bringing into being; production or reproduction, esp of offspring
2.

a successive stage in natural descent of organisms: the time between when an organism comes into being and when it reproduces
the individuals produced at each stage

3.
the normal or average time between two such generations of a species: about 35 years for humans
4.
a phase or form in the life cycle of a plant or animal characterized by a particular type of reproduction: the gametophyte generation
5.
all the people of approximately the same age, esp when considered as sharing certain attitudes, etc
6.
production of electricity, heat, etc
7.
(physics) a set of nuclei formed directly from a preceding set in a chain reaction
8.
(modifier, in combination)

belonging to a generation specified as having been born in or as having parents, grandparents, etc, born in a given country: a third-generation American
belonging to a specified stage of development in manufacture, usually implying improvement: a second-generation computer

generation gen·er·a·tion (jěn’ə-rā’shən)
n.

A form or stage in the life cycle of an organism.

All of the offspring that are at the same stage of descent from a common ancestor.

The average interval of time between the birth of parents and the birth of their offspring.

A group of individuals born and living about the same time.

A group of generally contemporaneous individuals regarded as having common cultural or social characteristics and attitudes.

The act or process of generating; origination, production, or procreation.

generation
(jěn’ə-rā’shən)

All of the offspring that are at the same stage of descent from a common ancestor.

The average interval of time between the birth of parents and the birth of their offspring.

A form or stage in the life cycle of an organism. See more at alternation of generations.

The formation of a line or geometric figure by the movement of a point or line.

Gen. 2:4, “These are the generations,” means the “history.” 5:1, “The book of the generations,” means a family register, or history of Adam. 37:2, “The generations of Jacob” = the history of Jacob and his descendants. 7:1, “In this generation” = in this age. Ps. 49:19, “The generation of his fathers” = the dwelling of his fathers, i.e., the grave. Ps. 73:15, “The generation of thy children” = the contemporary race. Isa. 53:8, “Who shall declare his generation?” = His manner of life who shall declare? or rather = His race, posterity, shall be so numerous that no one shall be able to declare it. In Matt. 1:17, the word means a succession or series of persons from the same stock. Matt. 3:7, “Generation of vipers” = brood of vipers. 24:34, “This generation” = the persons then living contemporary with Christ. 1 Pet. 2:9, “A chosen generation” = a chosen people. The Hebrews seem to have reckoned time by the generation. In the time of Abraham a generation was an hundred years, thus: Gen. 15:16, “In the fourth generation” = in four hundred years (comp. verse 13 and Ex. 12:40). In Deut. 1:35 and 2:14 a generation is a period of thirty-eight years.