Table 1.

Glossary of key terms related to building a volumetric biological image analysis citizen science project with the Zooniverse

Term	Definition
Aggregation	Combining multiple classifications associated with a subject to form consensus.
Annotation	Adding meaning to image data through placing marks, drawing or noting information about the content of the image.
Classification	All data associated with a contributor response to a workflow for an individual subject.
Classification interface	Online interface where contributors complete the project workflow.
Contributor	Individual who submits data through completing the project workflow. Encompasses volunteers, researchers, students, etc.
Field guide	A place to store general project information relevant to completing the project workflow(s). It is accessible to contributors as a clickable tab on the right-hand side of the classification interface.
Flipbook	Multiple images can be displayed as a single subject using the Flipbook functionality.
Help text	A pop-up window available in the classification interface when contributors click 'Need some help?'.
Launch	Commencing data collection by sharing a Zooniverse project with contributors.
Manifest	A .csv or .tsv file that provides information about project subjects.
Project builder	Online interface for creating a citizen science project with the Zooniverse (www.zooniverse.org/lab).
Project lead	Individual building a Zooniverse project.
Retirement limit	Number of classifications required per subject.
Segmentation	Process of assigning pixels of a digital image into separate regions.
Subject	A unit of data to be classified. Subjects are presented to a contributor within the classification interface. Subjects can be images, videos, gifs, audio, numerical data, text.
Talk	Discussion forum associated with each project. Default and customised ‘talk boards’ can be created by the project lead.
Task	A unit of work associated with a subject. Can be of the class ‘question’, ‘drawing’, ‘text’ or ‘survey’.
Tutorial	Step-by-step introduction to the project task(s). Displays as a pop-up the first time a volunteer visits a project and remains accessible as a tab within the classification interface thereafter.
Volumetric imaging data	Three-dimensional data from e.g., electron or X-ray imaging platforms.
Workflow	Sequence of tasks completed by a contributor for a subject.
Zooniverse	An open, web-based platform for crowdsourced classification of data.