Primordium

A group of cells that represents the initial stages in development of a plant organ. Root and shoot primordia are present in a young plant embryo while leaf primordia (or leaf ...

genital primordium

Biology; Parasitology

A group of cells in juvenile nematodes that are the precursors of a reproductive system. Seen in rabditoid juveniles of Strongyloides but usually not detectable in those of ...

leaf primordium

Biotechnology; Genetic engineering

A lateral outgrowth from the apical meristem, which will become a leaf when fully developed and expanded.

kinase

Health care; Genetic disorders

Any of various enzymes that catalyze the transfer of phosphate groups from a high-energy phosphate-containing molecule (as ATP or ADP) to a substrate--called also phosphokinase.

hyperostosis

Health care; Genetic disorders

Increase in the mass of bone per unit volume.

type I skeletal muscle fibers

Health care; Genetic disorders

Skeletal muscle fibers having low myofibrillar ATPase activity, low glycogen content, and high myoglobin content, high mitochondrial oxidative enzyme activities, and an ...

pericardium

Health care; Genetic disorders

The fibroserous sac surrounding the heart and the roots of the great vessels.

fetus

Health care; Genetic disorders

An unborn or unhatched vertebrate especially after attaining the basic structural plan of its kind; specifically: a developing human from usually two months after conception to ...

myosin light chain

Health care; Genetic disorders

The smaller subunits of myosins that bind near the head groups of myosin heavy chains. The myosin light chains have a molecular weight of about 20 KDa and there are usually one ...