A honeycomb is a mass of hexagonal prismatic wax cells built by honey bees in their nests to contain their larvae and stores of honey and pollen.
https://en.wikipedia.org/wiki/Honeycomb

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ЗАСЕВ, яйца, отложенные пчелиной маткой или пчёлами-трутовками в ячейки сота. Может быть пчелиным — оплодотворённые яйца в пчелиных ячейках и трутневым — неоплодотворённые яйца в трутневых или пчелиных ячейках. При благоприятных условиях зимовки, когда в семьях достаточно мёда, перги, пчёл и имеется здоровая матка, засев появляется в январе—феврале, задолго до весеннего облёта пчёл. Ранней весной засев занимает незначительную площадь сота.
http://workbees.ru/encyclopedia-of-beekeeping/sowing

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Brood
In entomology, the term brood is used to refer to the embryo or egg, the larva and the pupa stages in the life of holometabolous insects. The brood of honey bees develops within a bee hive.

https://en.wikipedia.org/wiki/Brood_(honey_bee)

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Note added at 1 hr (2018-02-09 20:28:54 GMT)
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The brood comb is the beeswax structure of cells where the queen bee lays eggs. It is the part of the beehive where a new brood is raised by the colony. During the summer a good queen may lay 1500-2000 eggs per day, which results in 1500-2000 bees hatching after the three-week development period.

The brood comb is usually found in the lower part of the beehive, while the honeycomb may surround the brood area and is found exclusively in the honey supers. When a queen does not have enough brood comb to lay eggs, usually due to congestion from pollen or honey,[citation needed] the bee colony may be more prone to swarm.
https://en.wikipedia.org/wiki/Brood_comb