1. Too small to be visible to the naked eye

See also: seeable, visible

• have a go at it
• have a good time
• have a look
• have down
• have got
• have in mind
• have intercourse
• have it away
• have it coming
• have it off
• have kittens
• have on
• have sex
• have the best
• have to do with
• have words
• have young
• have-not
• Havel
• havelock
• haven
• haven't
• haver
• Haverhill fever
• haversack