The word is not a valid scrabble word

1 short excerpt of WikWik.org (WikWik is an online database of words defined in the English, French, Spanish, Italian, and other Wiktionnaries.)

• Appell␣sequence n. (Mathematics) Any polynomial sequence {𝑝_𝑛(𝑥)}_{𝑛＝0,1,2,...} satisfying the identity 𝑑/(𝑑𝑥)𝑝_𝑛(𝑥)＝𝑛𝑝_𝑛−1(𝑥)…

7 valid words from the definition

ANY IDENTITY MATHEMATICS POLYNOMIAL SATISFYING SEQUENCE THE

3 invalid words from the definition

DX NPN PN

11 words-in-word (Words found as is inside the word.)

APP APPEL EL ELL ELLS EN PE PEL PELL PELLS SEQUENCE

4 words-in-word RTL (Words found written from right to left, inside the word.)

ES LEP NE PA

Scrabble scoring

• Zero, invalid.

• 29 points, without game rules.

Other languages

• Invalid: French German Spanish Italian Romanian

Categories without words

• No anagrams (Word found by changing the order of the letters.)
• No cousins (Word found by changing only one letter.)
• No lipograms (Word found when removing only one letter.)
• No epentheses (Word found when adding only one letter.)
• No suffixes (Word found by adding one or more letters at the end of the word.)
• Not found in the middle (Word found by adding letters in front and at the end of the word.)
• No prefixes (Word found by adding one or more letters in front of the word.)
• No anagrams can be formed with an extra letter (New word formed with all the letters of the word and an extra letter.)
• No anagrams can be formed by removing a letter (New word formed with all the letters of the word minus a letter.)

Recommended websites

• Visit WikWik.org - the word is in the WikWik, see all the details (1 definition).
• www.BestWordList.com to create personalized word lists.
• www.BestWordClub.com to play duplicate online scrabble.
• Ortograf.ws to look for words.

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