SEGMENT n.
, rings, or joints into which many animal bodies are divided; a somite; a metamere; a somatome. Segment gear, a piece for receiving or communicating reciprocating motion from or to a cogwheel, consisting of a sector of a circular gear, or ring, having cogs on the periphery, or face. -- Segment of a line, the part of a…
SEGMENTATION n.
destitute of food yolk, the ovum or egg divides into two similar halves or segments (blastomeres), each of these again divides into two, and so on, thus giving rise to a mass of cells (mulberry mass, or morula), all equal and similar, from the growth and development of which the future animal is to be formed. This con…
STEEPLE n.
k. Rood steeple. See Rood tower, under Rood. -- Steeple bush (Bot.), a low shrub (Spiræa tomentosa) having dense panicles of minute rose-colored flowers; hardhack. -- Steeple chase, a race across country between a number of horsemen, to see which can first reach some distant object, as a church steeple; hence, a race…