- hologramA three-dimensional image of an object created by holography.
- holonOne of three kinds of quasiparticle (the others being the spinon and orbiton) that electrons in solids are able to split into during the process of spin–charge separation, when extremely tightly confined at temperatures close to absolute zero.
- holoprosencephalyA congenital disorder involving insufficient division of the lobes of the brain during fetal development, resulting in skull and facial deformities ranging from minor cleft lip problems to cyclopia, in which a single eye develops where the nose would normally be.
- holardThe total water content of a sample of soil
- holenmerismThe belief that the whole of God is present within every part of the universe.
- holo-Whole, entire.
- holocrineOf or relating to a mode of secretion in some exocrine glands in which the plasma membrane ruptures, releasing the cell's cytoplasm into the lumen of the gland.
- holomicticHaving layers of water that intermix at least once a year.
- holonymyA semantic relation that exists between a term denoting a whole (the holonym) and a term denoting a part that pertains to the whole (the meronym).