12-letter words containing a, x, e, r, o
- sandbox tree — a tropical American tree, Hura crepitans, of the spurge family, bearing a furrowed, roundish fruit about the size of an orange that when ripe and dry bursts with a sharp report and scatters the seeds.
- serotaxonomy — the study of the taxonomy of proteins using serological methods
- sexual spore — a spore formed after the fusion of gametes and an asexual spore is the result of asexual reproduction
- six-year-old — being six years in age
- solar plexus — Also called celiac plexus. Anatomy. a network of nerves situated at the upper part of the abdomen, behind the stomach and in front of the aorta.
- tetrahydroxy — (of a molecule) containing four hydroxyl groups.
- transfer box — A transfer box is a gear system that divides the power between the front and rear axles of a four-wheel drive system.
- unexplorable — to traverse or range over (a region, area, etc.) for the purpose of discovery: to explore the island.
- uranic oxide — uranium dioxide.
- xanthopterin — a yellow pigment, C6H5N5O2, found in some butterfly or moth wings or in the urine of mammals
- xenoreactive — (immunology) That generates a reaction to material from another species.