| 释义 |
prot-
combining form
or proto-
Etymology: Middle English protho-, from Middle French, from Late Latin proto-, from Late Greek prōt-, prōto-, from Greek, from prōtos; akin to Greek pro before, ahead — more at for
1.
a. : first in time
< protohistoric >
< protonymph >
b. : first in status : chief in rank or importance : principal
< protocerebrum >
< protocone >
c. : beginning : tending toward : giving rise to
< protofascism >
< protoplanet >
2. chemistry
a. : first or lowest of a series : member of a series having or supposed to have the smallest relative amount of the element or radical indicated in the name to which it is prefixed
< protoxide >
< protochloride >
b. : substance held to be the parent of the substance to the name of which it is prefixed
< protoactinium >
c. : first or primary product of decomposition
< protoproteose >
3. biology
a. : archetypal
< protomorph >
< protonephros >
b. : first formed : primary
< protoderm >
< protoxylem >
4. usually capitalized : belonging to or constituting the recorded or assumed language that is ancestral to a language or to a group of related languages or dialects — usually spelled proto- and joined to a capitalized second element with a hyphen
< Proto-Arabic >
< Proto-Indo-European > |