hypo-, hyp-

The part of the stem of an embryo, or young seedling, below the cotyledons.

As the plant embryo grows at germination, it sends out a shoot called a radicle that becomes the primary root and penetrates down into the soil. After emergence of the radicle, the hypocotyl emerges and lifts the growing tip (usually including the seed coat) above the ground, bearing the embryonc leaves (called cotyledons) and the plumule that gives rise to the first true leaves.

The hypocotyle is the primary organ of extension of the young plant and develops into the stem.

A decreased feeling of pain when exposed to cold.

A decreased sensitivity to cold.

The absence of, or partially missing of, fingers and/or toes at birth.

The congenital absence of part, or all, of one or more fingers or toes.

A lack of digits not caused by an amputation.

1. Subcutaneous injection of a saline or other solution.
2. The injection of nutrient fluids under the skin in the collapse resulting from cholera or other exhausting diseases.

Subcutaneous deposits of calcium. Also: calcinosis cutis.