Tube Nucleus

Science / Biology / Tube Nucleus: One of the cells in the male gametophyte in seed plants. The tube nucleus grows through the stigma, style, and into the ovule, clearing the way for the sperm nuclei to enter the embryo sac.

Other Words for Nucleus

Nucleus Noun Synonyms: core, heart, centre, kernel, pith, focus, nub

Pollen Tube

Science / Biology / Pollen Tube: Structure produced by the tube nucleus in the pollen grain through which the sperm nucleus (or nuclei in angiosperms) proceed to travel through to reach the egg. MORE

Tentacle-Tube-Foot Suspension Feeder

Science / Marine Biology / Tentacle-Tube-Foot Suspension Feeder: Suspension feeder that traps particles on distinct tentacles or tube feet (in echinoderms) MORE

Tube (Enclosure)

Technology / Home Audio / Tube (Enclosure): A type of woofer enclosure consisting of a long tube with a woofer at one end, and a port or Passive Radiator at the other. A good low-end reproducer, this design is very compact and generally used in MORE

Suprachiasmic Nucleus (SCN)

Science / Biology / Suprachiasmic Nucleus (SCN): A region of the hypothalamus that controls internal cycles of endocrine secretion. MORE

Sieve Tube Members

Science / Biology / Sieve Tube Members: Phloem cells that form long sieve tubes. See sieve elements. MORE


Science / Genetics / Pronucleus: The nucleus of a sperm or egg prior to fertilization. MORE