• Webster's Revised Unabridged Dictionary
    • Hydr- A combining form from Gr. water (see Hydra).
    • Hydr- (Chem) A combining form of hydrogen, indicating hydrogen as an ingredient as hydrochloric; or a reduction product obtained by hydrogen, as hydroquinone.
    • Hydr- See under Hydro-.
    • ***


In literature:

Magwyr murwydr hydr, hydreiddiad lwysle, Mygrwedd haul fore eurne arnad.
"Some Specimens of the Poetry of the Ancient Welsh Bards" by Evan Evans
LAURENT, "Recherches sur l'Hydre et l'Eponge d'eau douce," Voyage de la Bonite, ii, pp.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale

In science:

For the laboratory fluid problem of the hydr aulic jump, a similar type of symmetry was shown to exist, going up to the second order of nonlinearity (Ray & Bhattacharjee 2007b).
Implications of nonlinearity for spherically symmetric accretion