biological
/ˌbaɪ.ə(ʊ)ˈlɒd͡ʒ.ɪ.kəl/
"biological" is a 10-letter English headword indexed on PlainSpell.
The verdict
“biological” is a regularly-used English word, ranked #4,212 in English word frequency and used as an adjective.
- #4,212
- frequency rank, English
- 10
- letters
- 14
- tracked misspellings
- 2
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Of or relating to biology.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | biological |
| Language | English |
| Part of speech | Adjective |
| IPA | /ˌbaɪ.ə(ʊ)ˈlɒd͡ʒ.ɪ.kəl/ |
| Letters | 10 |
| Frequency rank | #4,212 |
| Misspellings tracked | 14 |
| Confusable pairs | 2 |
| Source | Wiktionary (kaikki.org) |
Where “biological” sits in English frequency
Spelling & Dictionary Insight
The English entry for biological is 10 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ˌbaɪ.ə(ʊ)ˈlɒd͡ʒ.ɪ.kəl/. Corpus data places it at rank #4,212 in overall English word frequency, indicating it appears regularly in written and spoken text. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 14 likely wrong-spelling variants for biological, with forms such as "bbiological", "biloogical", and "biolgoical". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 2 confusable-pair relationships, "biologically", "biologic", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: Etymology tree Proto-Indo-European *gʷeyh₃-der. Ancient Greek βίος (bíos) Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ (-ĭ́ā) Anci… The correct English form is biological, spelled B-I-O-L-O-G-I-C-A-L.
Definition
- 1Of or relating to biology.
- 2Relating to anatomy; anatomic, anatomical.
- 3Related by consanguinity, especially as to parents and children.
- 4Organic (grown without agrochemicals).
Etymology
Etymology tree Proto-Indo-European *gʷeyh₃-der. Ancient Greek βίος (bíos) Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ (-ĭ́ā) Ancient Greek -λογῐ́ᾱ (-logĭ́ā)bor. New Latin -logia New Latin biologialbor. English biology English -ical English biological From biology + -ical.
Synonyms
This word in other languages
Common misspellings
Also misspelled as: bbiological,biloogical,biolgoical,biollogical,biologcial,biologgical,biologiacl,biologicall,biologiccal,biologicla,bioloigcal,bioolgical,boilogical,ibological
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of biological - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
How do you spell "biological"?
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Using “biological”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is B-I-O-L-O-G-I-C-A-L - every other letter order is a misspelling in standard orthography.
- Say it as /ˌbaɪ.ə(ʊ)ˈlɒd͡ʒ.ɪ.kəl/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “biologically” - see the side-by-side comparison. biological vs biologically
- Browse more English words and confusable pairs in the same reference. English words
Data Source
Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.