前缀：tetra- 四(在元音前作tetr-)

tetracycline 四环素

tetrachord 四弦乐器

tetrode 四极管

tetrasyllable 四音节词

tetragon 四角形

tetraoxide 四氧化物

词根词缀：dexter-, dextra-, dextro-

【来源及含义】Latin: right, right hand, to the right; therefore, "skillful, fortunate"

【同源单词】ambidexter, ambidexterity, ambidextrous, ambisinistrodextrous, ambo dexter, amylodextrin

词根词缀：electro-, electr-, electri-

【来源及含义】Greek > Latin: electric, electricity; from amber, resembling amber, generated from amber which when rubbed vigorously [as by friction], produced the effect of static electricity

【相关描述】Equipment which we use everyday relies on electronics to function including calculators, car controls, cameras, washing machines, medical scanners, mobile telephones, radar systems, computers; as well as many other applications or devices which are listed in this unit.

【相关词根词缀】 A cross reference of word units that are related, directly and/or indirectly, with "electricity": galvano-; hodo-; ion-; piezo-; -tron; volt; biomechatronics, info; mechatronics, info.

【同源单词】acoustoelectric effect, acoustoelectronics, active electrode, ambulatory electrocardiographic monitoring, amphoteric electrolyte, anelectrotonus

词根词缀：ion, ion-

【来源及含义】Greek: ion, "going"; neuter present participle of ienai, "to go"; because an ion moves toward the electrode of an opposite charge

【相关词根词缀】 A cross reference of word units that are related, directly and/or indirectly, with "electricity": electro-; galvano-; hodo-; piezo-; -tron; volt; biomechatronics, info; mechatronics, info.

【同源单词】aeroionization, atmospheric ionization, avalanche ionization, carbonium ion, dipolar ion, heavy ion

词根词缀：sinistro-, sinistr-

【来源及含义】Latin: left, on the left side; at, toward, or using the left; left-handed

【同源单词】ambisinister, ambisinistrodextrous, dextrosinistral, sinister, sinistra, sinistrad