diarch /dīˈärk/ (botany)

Having two xylem strands

• lettern
• letter of attorney
• letter of comfort
• letter of credit
• letter of indication
• letter-of-marque
• letter of peace
• letter-perfect
• letterpress
• letterpresses
• letter quality
• letter-quality
• letters
• letters credential
• letterset
• lettersets
• letters of administration
• letters of comfort
• letters of credence
• letters of credit
• letters of horning
• letters of indication
• letters of intercommuning
• letters-of-marque
• Letters of peace