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λόγος

lógos

study, account

73 words in English grow from this root.

Agroecology

Nature
ἀγρόςagrós

study of the farm household

Alogia

Mind
ἀ-a-

without speech

Analog

Science
ἀνάaná

in proportion

Analogue

Science
ἀνάaná

according to ratio

Analogy

Words
ἀνάaná

according to ratio

Anthropology

Politics
ἄνθρωποςánthrōpos

study of humankind

Apologue

Words
ἀπόapó

a telling-off, a tale told

Apology

Words
ἀπόapó

a speaking back

Astrobiology

Earth
ἄστρονástron

study of star life

Astrology

Earth
ἄστρονástron

account of the stars

Christology

Faith
ΧριστόςKhristós

study of the anointed one

Cohomology

Number
ὁμόςhomós

the paired form of same-ratio

Cosmology

Earth
κόσμοςkósmos

study of the ordered whole

Dendrochronology

Science
δένδρονdéndron

study of tree time

Dendrology

Nature
δένδρονdéndron

study of trees

Deontology

Philosophy
δέονdéon

study of what must be done

Dialogue

Philosophy
διάdiá

words between

Doxology

Faith
δόξαdóxa

words of glory

Ecclesiology

Faith
ἐκκλησίαekklēsía

study of the assembly

Ecology

Nature
οἶκοςoîkos

study of the household

Entomology

Nature
ἔντομονéntomon

study of the notched ones

Epidemiology

Medicine
ἐπίepí

study of what is upon the people

Epilogue

Words
ἐπίepí

words added on

Epistemology

Philosophy
ἐπιστήμηepistḗmē

study of knowledge

Eschatology

Faith
ἔσχατοςéskhatos

the study of last things

Etiology

Medicine
αἰτίαaitía

study of causes

Etymology

Words
ἔτυμονétymon

the account of the true sense

Eulogy

Words
εὖ

good speaking

Exobiology

Earth
ἔξωéxō

study of outside life

Genealogy

Politics
γενεάgeneá

account of descent

Geology

Earth
γῆ

study of the earth

Homology

Number
ὁμόςhomós

same ratio

Horology

Science
ὥραhṓra

study of hours

Hydrology

Earth
ὕδωρhýdōr

water study

Ichthyology

Nature
ἰχθύςichthýs

study of fishes

Ideology

Politics
ἰδέαidéa

study of ideas

Kinesiology

Sport
κίνησιςkínēsis

study of movement

Logarithm

Number
λόγοςlógos

ratio-number

Logic

Philosophy
λόγοςlógos

the art of reasoning

Logo

Art
λόγοςlógos

word

Logorrhea

Mind
λόγοςlógos

word flow

Logos

Philosophy
λόγοςlógos

word, reckoning

Logotype

Art
λόγοςlógos

word-stamp

Methodology

Science
μετάmetá

study of the road followed

Metrology

Number
μέτρονmétron

study of measurement

Microbiology

Science
μικρόςmikrós

study of small life

Monologue

Art
μόνοςmónos

speaking alone

Morphology

Nature
μορφήmorphḗ

study of form

Nanotechnology

Science
νᾶνοςnânos

study of dwarf craft

Neologism

Words
νέοςnéos

new word

Oenology

Everyday
οἶνοςoînos

study of wine

Ontology

Philosophy
ὄνón

study of being

Ornithology

Nature
ὄρνιςórnis

study of birds

Paleontology

Earth
παλαιόςpalaiós

study of ancient beings

Pathology

Medicine
πάθοςpáthos

study of suffering

Pedology

Earth
πέδονpédon

study of the soil

Phenology

Nature
φαίνεινphaínein

study of appearings

Phenomenology

Philosophy
φαινόμενονphainómenon

study of what appears

Philology

Words
φίλοςphílos

love of words

Phonology

Words
φωνήphōnḗ

study of sound

Prologue

Words
πρόpró

the words before

Seismology

Earth
σεισμόςseismós

study of earthquakes

Sociology

Politics
λόγοςlógos

study of companions

Soteriology

Faith
σωτηρίαsōtēría

study of deliverance

Speleology

Earth
σπήλαιονspḗlaion

study of caves

Tautology

Words
ταὐτόtautó

saying the same

Teleology

Philosophy
τέλοςtélos

study of ends

Tetralogy

Words
τετρα-tetra-

four discourses

Theology

Philosophy
θεόςtheós

talk about god

Topology

Number
τόποςtópos

study of place

Toxicology

Medicine
τοξικόνtoxikón

study of arrow poison

Trilogy

Art
τρι-tri-

three tellings

Zoology

Nature
ζῷονzôion

study of living things