释义 |
WordReference Random House Unabridged Dictionary of American English © 2024orth-, - var. of ortho- before a vowel:orthicon.
Orth., - Orthodox.
orth., - Medicineorthopedic
- Medicineorthopedics.
WordReference Random House Unabridged Dictionary of American English © 2024or•tho (ôr′thō),USA pronunciation adj. [Chem.]- Chemistrypertaining to or occupying two adjacent positions in the benzene ring. Cf. meta 2, para 3.
- independent use of ortho- 1875–80
ortho-, - a combining form occurring in loanwords from Greek, where it meant "straight,'' "upright,'' "right,'' "correct'' (orthodox) and on this model used in the formation of compound words (orthopedic).
- Chemistry
- a combining form used in the name of that acid in a given series of acids that contains the most water (orthoboric acid). Cf. meta-, pyro-.
- Chemistrya combining form used in the names of the salts of these acids: if the acid ends in -ic, the corresponding salt ends in -ate (orthoboric acid (H3BO3) and potassium orthoborate (K3BO3))* if the acid ends in -ous, the corresponding salt ends in -ite (orthoantimonous acid (H3SbO3) and potassium orthoantimonite (K3SbO3)).
Also,[esp. before a vowel,] orth-. - Greek, combining form of orthós straight, upright, correct
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