| Subject | Italian | English |
| chem., el. | canali gemelli | twin flue |
| chem., el. | canali gemelli | hairpin flue |
| met. | cantonali gemelli | twin angle iron |
| commun., transp. | cavo gemello | twin ribbon cable |
| med. | cinque gemelli | quintuplets |
| construct. | città gemelle | twin cities |
| construct. | città gemelle | double town |
| met. | coltivazione a due tagli gemelli | double-unit working |
| transp., construct. | conche di navigazione gemelle | twin lock |
| transp., construct. | conche di navigazione gemelle | double locks |
| antenn. | diodi gemelli | twin diode |
| med. | formazione gemellare | double formation |
| met. | galleria gemella | air end way |
| met. | gallerie gemelle | double entry |
| transp. | gemella della molla di sospensione | suspension shackle |
| transp. | gemella della molla di sospensione | spring shackle |
| med. | gemelli bicoriali | heterologous twins |
| med. | gemelli bicoriali | dichorial twins |
| med. | gemelli bicoriali | diovular twins |
| med. | gemelli bicoriali | fraternal twins |
| med. | gemelli bicoriali | unlike twins |
| med. | gemelli bicoriali | hetero-ovular twins |
| med. | gemelli bicoriali | heterologus twins |
| med. | gemelli bicoriali | false twins |
| med. | gemelli bicoriali | dissimilar twins |
| med. | gemelli bicoriali | dichorionic twins |
| med. | gemelli bicoriali | binovular twins |
| med. | gemelli bicoriali | dizygotic twins |
| med. | gemelli biovulari | dissimilar twins |
| med. | gemelli biovulari | heterologus twins |
| med. | gemelli biovulari | unlike twins |
| med. | gemelli biovulari | hetero-ovular twins |
| med. | gemelli biovulari | fraternal twins |
| med. | gemelli biovulari | false twins |
| med. | gemelli biovulari | dizygotic twins |
| med. | gemelli biovulari | dichorionic twins |
| med. | gemelli biovulari | dichorial twins |
| med. | gemelli biovulari | binovular twins |
| med. | gemelli congiunti | conjoined twins |
| med. | gemelli congiunti | Siamese twins |
| agric. | gemelli dicoriali | dizygotic twins |
| med. | gemelli dizigoti | diovular twins |
| agric. | gemelli dizigoti | dizygotic twins |
| med. | gemelli dizigoti | dichorial twins |
| med. | gemelli dizigoti | heterologous twins |
| med. | gemelli dizigoti | fraternal twins |
| agric. | gemelli eterologhi | dizygotic twins |
| med. | gemelli identici | identical twins |
| med. | gemelli identici | uniovular twins |
| med. | gemelli identici | monochorial twins |
| med. | gemelli identici | enzygotic twins |
| med. | gemelli identici | monovular twins |
| med. | gemelli identici | monozygotic twins |
| agric. | gemelli monocoriali | monozygotic twins |
| med. | gemelli monocoriali | monochorionic twins (gemini aequales) |
| med. | gemelli monocoriali | true twins (gemini aequales) |
| med. | gemelli monocoriali | one-egg twins (gemini aequales) |
| med. | gemelli monocoriali | similar twins (gemini aequales) |
| med. | gemelli monocoriali | mono-ovular twins (gemini aequales) |
| med. | gemelli monocoriali | monochorial twins (gemini aequales) |
| med. | gemelli monocoriali | identical twins (gemini aequales) |
| med. | gemelli monocoriali | enzygotic twins (gemini aequales) |
| med. | gemelli monocoriali | uniovular twins (gemini aequales) |
| med. | gemelli monocoriali | monozygotic twins (gemini aequales) |
| med. | gemelli monoovulari | monovular twins |
| agric. | gemelli monoovulari | monozygotic twins |
| med. | gemelli monoovulari | enzygotic twins (gemini aequales) |
| med. | gemelli monoovulari | monozygotic twins (gemini aequales) |
| med. | gemelli monoovulari | mono-ovular twins (gemini aequales) |
| med. | gemelli monoovulari | one-egg twins (gemini aequales) |
| med. | gemelli monoovulari | true twins (gemini aequales) |
| med. | gemelli monoovulari | similar twins (gemini aequales) |
| med. | gemelli monoovulari | monochorionic twins (gemini aequales) |
| med. | gemelli monoovulari | monochorial twins (gemini aequales) |
| med. | gemelli monoovulari | uniovular twins (gemini aequales) |
| med. | gemelli monoovulari | identical twins (gemini aequales) |
| agric. | gemelli monozigoti | monozygotic twins |
| med. | gemelli monozigotici | monochorial twins |
| med. | gemelli monozigotici | enzygotic twins |
| med. | gemelli monozigotici | identical twins |
| med. | gemelli monozigotici | monovular twins |
| med. | gemelli monozigotici | uniovular twins |
| med. | gemelli monozigotici | monozygotic twins |
| med. | gemelli siamesi | conjoined twins |
| med. | gemelli siamesi | Siamese twins |
| med. | gemelli simili | uniovular twins |
| med. | gemelli simili | monochorial twins |
| med. | gemelli simili | enzygotic twins |
| med. | gemelli simili | identical twins |
| med. | gemelli simili | monovular twins |
| med. | gemelli simili | monozygotic twins |
| med. | gemelli uniovulari | enzygotic twins |
| med. | gemelli uniovulari | monochorial twins |
| med. | gemelli uniovulari | identical twins |
| med. | gemelli uniovulari | uniovular twins |
| med. | gemelli uniovulari | monovular twins |
| med. | gemelli uniovulari | monozygotic twins |
| med. | gemelli veri | monochorial twins |
| med. | gemelli veri | monovular twins |
| med. | gemelli veri | uniovular twins |
| med. | gemelli veri | enzygotic twins |
| med. | gemelli veri | identical twins |
| med. | gemelli veri | monozygotic twins |
| nat.sc. | gemello dizigotico | dizygous twin |
| nat.sc. | gemello dizigotico | fraternal twin |
| nat.sc. | gemello dizigotico | dizygotic twin |
| el. | gemello doppio | double twin |
| nat.sc. | gemello monozigotico | monozygotic twin |
| nat.sc. | gemello monozigotico | identical twin |
| life.sc., anim.husb. | gestazione gemellare | twinning |
| life.sc., anim.husb. | gestazione gemellare | twin pregnancy |
| life.sc., anim.husb. | gravidanza gemellare | twinning |
| life.sc., anim.husb. | gravidanza gemellare | twin pregnancy |
| med. | gravidanza gemellare dizigote | dizygotic pregnancy |
| med. | gravidanza gemellare monozigote | monozygotic pregnancy |
| stat. | leggi gemelli | twinned distributions |
| met. | macchina gemella | twin engine |
| med. | modello dei domini gemelli | twin domain model |
| med. | muscolo gemello inferiore | gemellus inferior (musculus gemellus inferior) |
| med. | muscolo gemello inferiore | muscle gemellus inferior |
| med. | muscolo gemello inferiore | muscle gemellus tuberalis |
| med. | muscolo gemello inferiore | inferior gemellus muscle (musculus gemellus inferior) |
| med. | muscolo gemello superiore | gemellus superior (musculus gemellus superior) |
| med. | muscolo gemello superiore | muscle gemellus superior |
| med. | muscolo gemello superiore | muscle gemellus spinalis |
| med. | muscolo gemello superiore | superior gemellus muscle (musculus gemellus superior) |
| nat.sc., agric. | nascita gemellare | twin birth |
| transp., nautic., fish.farm. | nave gemella | sister ship |
| transp., construct. | palancole gemelle | twin sheet piles |
| med. | parto gemellare | twin birth |
| insur. | polizza gemelli | multiple birth insurance |
| met. | pompa a vapore gemella | twin steam pump |
| nat.sc., agric. | produzione di gemelli | production of twins |
| fish.farm. | reti gemelle a divergenti | otter twin trawls |
| fish.farm. | reti gemelle a divergenti | multi-rig otter trawls |
| mech.eng. | ruota gemella | dual gear |
| mech.eng. | ruota gemella | twin gear |
| mech.eng. | ruota gemella | double gear |
| mech.eng. | ruote gemelle | twin wheels |
| transp. | ruote gemelle | dual wheels |
| transp. | ruote gemelle | twinned wheels |
| pharma. | Studio di gemelli | Twin study |
| med. | studio di gemelli | twin study |
| automat. | trasportatore di nastro a gemelli | twin tape transporter |
| construct. | travi gemelle | twin girder |
| nat.sc., agric. | ugello gemello | twin nozzle |
| nat.sc., agric. | ugello gemello | double spray head |
| mech.eng. | vite senza fine gemella | twin worm |