(anatomy) A membrane which completely or partially occludes the vaginal opening in human females. / (figuratively) Marriage.

(chemistry) The linear combination of atomic orbitals in a molecule to form hybrid orbitals.

(organic chemistry) A compound consisting only of carbon and hydrogen atoms.

Any bulbous plant of the genus Hyacinthus, native to the Mediterranean and South Africa. / A variety of zircon, ranging in color from brown, orange, reddish-brown and yellow; a jacinth.

The science of health, its promotion and preservation. / Those conditions and practices that promote and preserve health. / Cleanliness.

(physics) Of, or relating to the science of hydrodynamics. / Operated by the force of water in motion.

The science of the properties, distribution, and effects of water on a planet's surface, in the soil and underlying rocks, and in the atmosphere

(chemistry) Of or relating to hydrochloric acid.

(chemistry) A univalent radical or functional group (–OH) in organic chemistry; present in alcohols, phenols, carboxylic acids and certain other classes of compounds.

(chemistry) A solid compound containing or linked to water molecules. / (inorganic chemistry, rare) Water.