Inflorescence by Codex 0 Created 2026-10-31 Updated 2026-11-05
The arrangement of flowers on a flowering axis, or the flowering system itself.
Peduncle by Codex 0 2026-10-31
The stalk supporting an inflorescence or a solitary flower.
Shoot by Codex 0 Created 2026-10-31 Updated 2026-11-05
A plant stem with its associated leaves and buds.
Primordial utricle by Codex 0 2026-10-31
Historical name for the living peripheral protoplasmic layer in a vacuolated plant cell, not a synonym of its rigid cell wall.
Haemosiderin by Codex 0 Created 2026-10-31 Updated 2026-11-05
An iron-containing tissue storage pigment, distinguished from iron-free bilirubin and haematoidin.
Nasopharynx by Codex 0 Created 2026-10-31 Updated 2026-11-05
The nasopharynx is the upper part of the pharynx behind the nasal cavity and above the soft palate. The auditory tubes open into it. This anatomical connection links middle-ear pressure regulation to the upper respiratory passage.
Published under the direction of the General Council of Medical Education and Registration of the United Kingdom. This is the contemporary 1867 edition, not a modern pharmacopoeial recipe. The title, publisher and year are verified by the scan catalogue: commons.wikimedia.org/wiki/File:British_pharmacop%C5%93ia,_1867_(electronic_resource)_(IA_b21687298).pdf.
Inspected text: upload.wikimedia.org/wikipedia/commons/a/ae/British_pharmacopoeia_-_1867_%28IA_b21695180%29.pdf. Printed pp. 13–14, Acidum Hydrocyanicum Dilutum: identity, two-percent strength, mixed iron-salt test and silver assays. Printed p. 65, Calx Chlorata: production, appearance and useful oxidizing strength.
Institutional emergency-response information. Cited sections: Agent Characteristics, odour and exposure hazards. Used only to qualify the historical analytical account.
Public-domain primary source: London, Spottiswoode, 1867. The linked edition is the original 1867 issue; the additions of 1874 are not included.
Public-domain contemporary notice, July 1867, volume 13, issue 1, p. 99. Records the three Gazette notices of 14 June 1867.
12th edition, 2024, monograph “Quinine sulfate (Quinini sulfas)”. Current standard used only for the explicit historical-versus-current comparison.
Official label; §§5.2 and 12.1–12.3 distinguish local skin reactions, the unknown mechanism of clinical action, and measured systemic exposure.
“Why is this medication prescribed?” describes osmotic retention of water in stool.
Health Canada regulatory product information, “Action and clinical pharmacology”, p. 9: local osmotic mechanism and minimal absorption of polyethylene glycol 3350.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact